Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each...

LQ

Lê Quỳnh Anh

20 tháng 12 2017

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions Unlike these fish, which are actually extinct, the coelacanth is a type of fish that was believed to be extinct. However, an unexpected twentieth- century rediscovery of living coelacanths has brought about a reassessment of the status of the prehistoric sea creature that was believed to have long since disappeared from the Earth. From fossil remains of the...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions

Unlike these fish, which are actually extinct, the coelacanth is a type of fish that was believed to be extinct. However, an unexpected twentieth- century rediscovery of living coelacanths has brought about a reassessment of the status of the prehistoric sea creature that was believed to have long since disappeared from the Earth. From fossil remains of the coelacanth, paleontologists have determined that the coelacanth was in existence around 350 million years ago, during the Paleozoic Era, more than 100 million years before the first dinosaurs arrived on the Earth. The most recent fossilized coelacanths date from around 70 million years ago, near the end of the age of dinosaurs. Because no fossilized remnants of coelacanth was believed to have died out around the same time as the dinosaurs.

The prehistoric coelacanth studied by paleontologists had distinctive characteristics that differentiated it from other fish. It was named for its hollow spine and was known to have been a powerful carnivore because of its many sharp teeth and a special joint in the skull that allowed the ferocious teeth to move in coordination with the lower jaw. It also had a pair of fins with unusual bony and muscular development that allowed the coelacanth to dart around the ocean floor. These fins also enable the coelacanth to search out prey trying to hide on the ocean bottom.

In 1938, a living specimen of the coelacanth was discovered in the catch of a fishing boat off the coast of South Africa, and since then numerous other examples of the coelacanth have been found in the waters of the Indian Ocean. This modern version of the coelacanth is not exactly the same as its prehistoric cousin. Today's coelacanth is larger than its prehistoric relative, measuring up to six feet in length and weighing up to 150 pounds. However, the modern version of the coelacanth still possesses the characteristic hollow spine and distinctive fins with their unusual bony and muscular structure.

According to the passage, why are scientists sure that the prehistoric coelacanth was a flesh-eater?

A. Because of its hollow spine

B. Because of its unusual bony and muscular development

C. Because of the shape and movement of the teeth

D. Because of the size of the skull

#Mẫu giáo

1

DH

Dương Hoàn Anh

20 tháng 12 2017

C

Kiến thức: Đọc hiểu

Giải thích:

Theo đoạn văn, tại sao các nhà khoa học chắc chắn rằng cá vây tay tiền sử là một loài ăn thịt?

A. Do cột sống rỗng của nó

B. Do sự phát triển xương và cơ bất thường của nó

C. Do hình dạng và chuyển động của răng

D. Do kích thước của hộp sọ

Thông tin: It was named for its hollow spine and was known to have been a powerful carnivore because of its many sharp teeth and a special joint in the skull that allowed the ferocious teeth to move in coordination with the lower jaw.

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LQ

Lê Quỳnh Anh

22 tháng 3 2019

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions Unlike these fish, which are actually extinct, the coelacanth is a type of fish that was believed to be extinct. However, an unexpected twentieth- century rediscovery of living coelacanths has brought about a reassessment of the status of the prehistoric sea creature that was believed to have long since disappeared from the Earth. From fossil remains of the...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions

Unlike these fish, which are actually extinct, the coelacanth is a type of fish that was believed to be extinct. However, an unexpected twentieth- century rediscovery of living coelacanths has brought about a reassessment of the status of the prehistoric sea creature that was believed to have long since disappeared from the Earth. From fossil remains of the coelacanth, paleontologists have determined that the coelacanth was in existence around 350 million years ago, during the Paleozoic Era, more than 100 million years before the first dinosaurs arrived on the Earth. The most recent fossilized coelacanths date from around 70 million years ago, near the end of the age of dinosaurs. Because no fossilized remnants of coelacanth was believed to have died out around the same time as the dinosaurs.

The prehistoric coelacanth studied by paleontologists had distinctive characteristics that differentiated it from other fish. It was named for its hollow spine and was known to have been a powerful carnivore because of its many sharp teeth and a special joint in the skull that allowed the ferocious teeth to move in coordination with the lower jaw. It also had a pair of fins with unusual bony and muscular development that allowed the coelacanth to dart around the ocean floor. These fins also enable the coelacanth to search out prey trying to hide on the ocean bottom.

In 1938, a living specimen of the coelacanth was discovered in the catch of a fishing boat off the coast of South Africa, and since then numerous other examples of the coelacanth have been found in the waters of the Indian Ocean. This modern version of the coelacanth is not exactly the same as its prehistoric cousin. Today's coelacanth is larger than its prehistoric relative, measuring up to six feet in length and weighing up to 150 pounds. However, the modern version of the coelacanth still possesses the characteristic hollow spine and distinctive fins with their unusual bony and muscular structure.

It can be inferred from the passage that the word “coelacanth” comes from the Greek

A. sharp teeth

B. extinct fish

C. hollow spine

D. bony fingers

#Mẫu giáo

1

DH

Dương Hoàn Anh

22 tháng 3 2019

C

Kiến thức: Đọc hiểu

Giải thích:

Có thể suy luận từ đoạn văn rằng từ "coelacanth" xuất phát từ tiếng Hy Lạp

A. răng sắc bén B. cá đã tuyệt chủng

C. cột sống rỗng D. ngón tay xương xẩu

Thông tin: The prehistoric coelacanth studied by paleontologists had distinctive characteristics that differentiated it from other fish. It was named for its hollow spine

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LQ

Lê Quỳnh Anh

29 tháng 7 2017

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions Unlike these fish, which are actually extinct, the coelacanth is a type of fish that was believed to be extinct. However, an unexpected twentieth- century rediscovery of living coelacanths has brought about a reassessment of the status of the prehistoric sea creature that was believed to have long since disappeared from the Earth. From fossil remains of the...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions

Unlike these fish, which are actually extinct, the coelacanth is a type of fish that was believed to be extinct. However, an unexpected twentieth- century rediscovery of living coelacanths has brought about a reassessment of the status of the prehistoric sea creature that was believed to have long since disappeared from the Earth. From fossil remains of the coelacanth, paleontologists have determined that the coelacanth was in existence around 350 million years ago, during the Paleozoic Era, more than 100 million years before the first dinosaurs arrived on the Earth. The most recent fossilized coelacanths date from around 70 million years ago, near the end of the age of dinosaurs. Because no fossilized remnants of coelacanth was believed to have died out around the same time as the dinosaurs.

The prehistoric coelacanth studied by paleontologists had distinctive characteristics that differentiated it from other fish. It was named for its hollow spine and was known to have been a powerful carnivore because of its many sharp teeth and a special joint in the skull that allowed the ferocious teeth to move in coordination with the lower jaw. It also had a pair of fins with unusual bony and muscular development that allowed the coelacanth to dart around the ocean floor. These fins also enable the coelacanth to search out prey trying to hide on the ocean bottom.

In 1938, a living specimen of the coelacanth was discovered in the catch of a fishing boat off the coast of South Africa, and since then numerous other examples of the coelacanth have been found in the waters of the Indian Ocean. This modern version of the coelacanth is not exactly the same as its prehistoric cousin. Today's coelacanth is larger than its prehistoric relative, measuring up to six feet in length and weighing up to 150 pounds. However, the modern version of the coelacanth still possesses the characteristic hollow spine and distinctive fins with their unusual bony and muscular structure.

What is NOT true about the prehistoric coelacanth, according to the passage ?

A. It was smaller than the modern coelacanth.

B. It had a hollow pine and distinctive fins.

C. It weighed less than 150 pounds.

D. It measured as much as six feet in length.

#Mẫu giáo

1

DH

Dương Hoàn Anh

29 tháng 7 2017

D

Kiến thức: Đọc hiểu

Giải thích:

Điều gì là không đúng sự thật về cá vây tay tiền sử, theo đoạn văn?

A. Nó nhỏ hơn so với cá vây tay hiện đại. B. Nó có cột sống rỗng và vây khác thường.

C. Nó nặng chưa đầy 150 pound. D. Nó dài khoảng 6 feet.

Thông tin:

- Today's coelacanth is larger than its prehistoric relative, measuring up to six feet in length and weighing up to 150 pounds.

- However, the modern version of the coelacanth still possesses the characteristic hollow spine and distinctive fins with their unusual bony and muscular structure.

Đúng(0)

LQ

Lê Quỳnh Anh

7 tháng 12 2018

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions Unlike these fish, which are actually extinct, the coelacanth is a type of fish that was believed to be extinct. However, an unexpected twentieth- century rediscovery of living coelacanths has brought about a reassessment of the status of the prehistoric sea creature that was believed to have long since disappeared from the Earth. From fossil remains of the...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions

Unlike these fish, which are actually extinct, the coelacanth is a type of fish that was believed to be extinct. However, an unexpected twentieth- century rediscovery of living coelacanths has brought about a reassessment of the status of the prehistoric sea creature that was believed to have long since disappeared from the Earth. From fossil remains of the coelacanth, paleontologists have determined that the coelacanth was in existence around 350 million years ago, during the Paleozoic Era, more than 100 million years before the first dinosaurs arrived on the Earth. The most recent fossilized coelacanths date from around 70 million years ago, near the end of the age of dinosaurs. Because no fossilized remnants of coelacanth was believed to have died out around the same time as the dinosaurs.

The prehistoric coelacanth studied by paleontologists had distinctive characteristics that differentiated it from other fish. It was named for its hollow spine and was known to have been a powerful carnivore because of its many sharp teeth and a special joint in the skull that allowed the ferocious teeth to move in coordination with the lower jaw. It also had a pair of fins with unusual bony and muscular development that allowed the coelacanth to dart around the ocean floor. These fins also enable the coelacanth to search out prey trying to hide on the ocean bottom.

In 1938, a living specimen of the coelacanth was discovered in the catch of a fishing boat off the coast of South Africa, and since then numerous other examples of the coelacanth have been found in the waters of the Indian Ocean. This modern version of the coelacanth is not exactly the same as its prehistoric cousin. Today's coelacanth is larger than its prehistoric relative, measuring up to six feet in length and weighing up to 150 pounds. However, the modern version of the coelacanth still possesses the characteristic hollow spine and distinctive fins with their unusual bony and muscular structure.

What is stated in the passage about the prehistoric coelacanth?

A. It had few teeth.

B. It was a rather feeble fish.

C. It lived on plants.

D. It moved its teeth in an unusual way.

#Mẫu giáo

1

DH

Dương Hoàn Anh

7 tháng 12 2018

D

Kiến thức: Đọc hiểu

Giải thích:

Điều gì được nêu trong đoạn văn về cá vây tay thời tiền sử?

A. Có ít răng. B. Là một loài cá khá yếu.

C. Nó sống trên cây. D. Nó chuyển động răng của nó theo một cách khác thường.

Thông tin: It was named for its hollow spine and was known to have been a powerful carnivore because of its many sharp teeth and a special joint in the skull that allowed the ferocious teeth to move in coordination with the lower jaw.

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LQ

Lê Quỳnh Anh

4 tháng 12 2017

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions Unlike these fish, which are actually extinct, the coelacanth is a type of fish that was believed to be extinct. However, an unexpected twentieth- century rediscovery of living coelacanths has brought about a reassessment of the status of the prehistoric sea creature that was believed to have long since disappeared from the Earth. From fossil remains of the...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions

Unlike these fish, which are actually extinct, the coelacanth is a type of fish that was believed to be extinct. However, an unexpected twentieth- century rediscovery of living coelacanths has brought about a reassessment of the status of the prehistoric sea creature that was believed to have long since disappeared from the Earth. From fossil remains of the coelacanth, paleontologists have determined that the coelacanth was in existence around 350 million years ago, during the Paleozoic Era, more than 100 million years before the first dinosaurs arrived on the Earth. The most recent fossilized coelacanths date from around 70 million years ago, near the end of the age of dinosaurs. Because no fossilized remnants of coelacanth was believed to have died out around the same time as the dinosaurs.

The prehistoric coelacanth studied by paleontologists had distinctive characteristics that differentiated it from other fish. It was named for its hollow spine and was known to have been a powerful carnivore because of its many sharp teeth and a special joint in the skull that allowed the ferocious teeth to move in coordination with the lower jaw. It also had a pair of fins with unusual bony and muscular development that allowed the coelacanth to dart around the ocean floor. These fins also enable the coelacanth to search out prey trying to hide on the ocean bottom.

In 1938, a living specimen of the coelacanth was discovered in the catch of a fishing boat off the coast of South Africa, and since then numerous other examples of the coelacanth have been found in the waters of the Indian Ocean. This modern version of the coelacanth is not exactly the same as its prehistoric cousin. Today's coelacanth is larger than its prehistoric relative, measuring up to six feet in length and weighing up to 150 pounds. However, the modern version of the coelacanth still possesses the characteristic hollow spine and distinctive fins with their unusual bony and muscular structure.

This passage is about a fish

A. that is extinct

B. that once was extinct

C. that is becoming extinct

D. that is not extinct

#Mẫu giáo

1

DH

Dương Hoàn Anh

4 tháng 12 2017

D

Kiến thức: Đọc hiểu

Giải thích:

Đoạn này nói về một con cá

A. hiện đã tuyệt chủng B. đã từng bị tuyệt chủng

C. đang trở nên bị tuyệt chủng D. không bị tuyệt chủng

Thông tin: Unlike these fish, which are actually extinct, the coelacanth is a type of fish that was believed to be extinct. However, an unexpected twentieth- century rediscovery of living coelacanths has brought about a reassessment of the status of the prehistoric sea creature that was believed to have long since disappeared from the Earth.

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LQ

Lê Quỳnh Anh

13 tháng 4 2018

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions Unlike these fish, which are actually extinct, the coelacanth is a type of fish that was believed to be extinct. However, an unexpected twentieth- century rediscovery of living coelacanths has brought about a reassessment of the status of the prehistoric sea creature that was believed to have long since disappeared from the Earth. From fossil remains of the...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions

Unlike these fish, which are actually extinct, the coelacanth is a type of fish that was believed to be extinct. However, an unexpected twentieth- century rediscovery of living coelacanths has brought about a reassessment of the status of the prehistoric sea creature that was believed to have long since disappeared from the Earth. From fossil remains of the coelacanth, paleontologists have determined that the coelacanth was in existence around 350 million years ago, during the Paleozoic Era, more than 100 million years before the first dinosaurs arrived on the Earth. The most recent fossilized coelacanths date from around 70 million years ago, near the end of the age of dinosaurs. Because no fossilized remnants of coelacanth was believed to have died out around the same time as the dinosaurs.

The prehistoric coelacanth studied by paleontologists had distinctive characteristics that differentiated it from other fish. It was named for its hollow spine and was known to have been a powerful carnivore because of its many sharp teeth and a special joint in the skull that allowed the ferocious teeth to move in coordination with the lower jaw. It also had a pair of fins with unusual bony and muscular development that allowed the coelacanth to dart around the ocean floor. These fins also enable the coelacanth to search out prey trying to hide on the ocean bottom.

In 1938, a living specimen of the coelacanth was discovered in the catch of a fishing boat off the coast of South Africa, and since then numerous other examples of the coelacanth have been found in the waters of the Indian Ocean. This modern version of the coelacanth is not exactly the same as its prehistoric cousin. Today's coelacanth is larger than its prehistoric relative, measuring up to six feet in length and weighing up to 150 pounds. However, the modern version of the coelacanth still possesses the characteristic hollow spine and distinctive fins with their unusual bony and muscular structure.

The topic of the preceding paragraph is most likely

A. the discovery of the coelacanth

B. a reassessment of the status of a number of kinds of fish

C. a particular prehistoric sea creature

D. various extinct fish

#Mẫu giáo

1

DH

Dương Hoàn Anh

13 tháng 4 2018

D

Kiến thức: Đọc hiểu

Giải thích:

Chủ đề của đoạn trước rất có thể là

A. sự khám phá cá vây tay B. đánh giá lại tình trạng của một số loại cá

C. một sinh vật biển thời tiền sử đặc biệt D. các loài cá tuyệt chủng khác nhau

Bởi ở đầu bài viết này có nhắc đến “these fish, which are actually extinct” nên đoạn trước có thể nói về các loài cá đã tuyệt chủng

Dịch bài đọc:

Không giống như những loài cá này thực sự đã tuyệt chủng, cá vây tay là một loại cá được cho là đã tuyệt chủng. Tuy nhiên, một khám phá lạ lùng trong thế kỷ hai mươi về cá vây tay sống đã mang đến một đánh giá về trạng thái của sinh vật biển tiền sử được cho là từ lâu đã biến mất khỏi Trái Đất.

Từ các hóa thạch còn lại của cá vây tay, các nhà cổ sinh vật học đã xác định rằng cá vây tay đã tồn tại khoảng 350 triệu năm trước, trong kỷ nguyên Paleozoi, hơn 100 triệu năm trước khi những con khủng long đầu tiên xuất hiện trên trái đất. Các loài cá vây tay hoá thạch gần đây nhất được cho là từ khoảng 70 triệu năm trước, gần cuối thời kỳ khủng long. Bởi vì không có hóa thạch còn sót lại của cá vây tay được cho là đã chết trong khoảng thời gian giống như khủng long.

Cá vây tay tiền sử được các nhà cổ sinh vật học nghiên cứu có đặc điểm phân biệt với các loài cá khác. Nó được đặt tên bởi cột sống rỗng của nó và được biết đến là một động vật ăn thịt mạnh bởi nhiều răng sắc và một khớp đặc biệt trong hộp sọ cho phép răng khoẻ mạnh chuyển động cùng với hàm dưới. Nó cũng có một đôi vây với sự phát triển xương và cơ bắp bất thường cho phép cá vây tay lặn xuống đáy đại dương. Những vây này cũng cho phép cá vây tay tìm ra con mồi cố gắng trốn trên đáy đại dương.

Năm 1938, một mẫu vật sống của cá vây tay đã được tìm thấy trong một chiếc thuyền đánh bắt ngoài khơi Nam Phi, và kể từ đó nhiều ví dụ khác của cá vây tay đã được tìm thấy ở vùng biển Ấn Độ Dương. Phiên bản hiện đại của cá vây tay không hoàn toàn giống với thời tiền sử của nó. Cá vây tay ngày nay lớn hơn so với tiền sử của nó, có chiều dài lên đến 6 feet và nặng đến 150 pound. Tuy nhiên, phiên bản hiện đại của cá vây tay vẫn có cột sống rỗng đặc trưng và các vây đặc biệt với cấu trúc xương và cơ bất thường của chúng.

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LQ

Lê Quỳnh Anh

18 tháng 9 2017

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions Unlike these fish, which are actually extinct, the coelacanth is a type of fish that was believed to be extinct. However, an unexpected twentieth- century rediscovery of living coelacanths has brought about a reassessment of the status of the prehistoric sea creature that was believed to have long since disappeared from the Earth. From fossil remains of the...

Đọc tiếp

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions

Unlike these fish, which are actually extinct, the coelacanth is a type of fish that was believed to be extinct. However, an unexpected twentieth- century rediscovery of living coelacanths has brought about a reassessment of the status of the prehistoric sea creature that was believed to have long since disappeared from the Earth. From fossil remains of the coelacanth, paleontologists have determined that the coelacanth was in existence around 350 million years ago, during the Paleozoic Era, more than 100 million years before the first dinosaurs arrived on the Earth. The most recent fossilized coelacanths date from around 70 million years ago, near the end of the age of dinosaurs. Because no fossilized remnants of coelacanth was believed to have died out around the same time as the dinosaurs.

The prehistoric coelacanth studied by paleontologists had distinctive characteristics that differentiated it from other fish. It was named for its hollow spine and was known to have been a powerful carnivore because of its many sharp teeth and a special joint in the skull that allowed the ferocious teeth to move in coordination with the lower jaw. It also had a pair of fins with unusual bony and muscular development that allowed the coelacanth to dart around the ocean floor. These fins also enable the coelacanth to search out prey trying to hide on the ocean bottom.

In 1938, a living specimen of the coelacanth was discovered in the catch of a fishing boat off the coast of South Africa, and since then numerous other examples of the coelacanth have been found in the waters of the Indian Ocean. This modern version of the coelacanth is not exactly the same as its prehistoric cousin. Today's coelacanth is larger than its prehistoric relative, measuring up to six feet in length and weighing up to 150 pounds. However, the modern version of the coelacanth still possesses the characteristic hollow spine and distinctive fins with their unusual bony and muscular structure.

The pronoun “It” in the third paragraph refers to

A. coordination

B. coelacanth

C. joint

D. jaw

#Mẫu giáo

1

DH

Dương Hoàn Anh

18 tháng 9 2017

B

Kiến thức: Đọc hiểu

Giải thích:

Đại từ "Nó" ở đoạn thứ ba đề cập đến

A. phối hợp B. cá vây tay

C. khớp D. hàm

“It” đề cập đến cá vây tay: The prehistoric coelacanth studied by paleontologists had distinctive characteristics that differentiated it from other fish. […] It also had a pair of fins with unusual bony and muscular development that allowed the coelacanth to dart around the ocean floor.

Cá vây tay tiền sử được các nhà cổ sinh vật học nghiên cứu có đặc điểm phân biệt với các loài cá khác. […] Nó cũng có một đôi vây với sự phát triển xương và cơ bắp bất thường cho phép cá vây tay lặn xuống đáy đại dương.

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LQ

Lê Quỳnh Anh

14 tháng 11 2017

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions. Dinosaurs were reptiles that lived during a period of earth’s history called the Mesozoic Era, which is known as the Age of Reptiles. The first dinosaurs appeared more than 200 million years ago. For many millions of years, they dominated the land with their huge size and strength. Then about 65 million years ago, they died out rather suddenly, never to...

Đọc tiếp

#Mẫu giáo

1

DH

Dương Hoàn Anh

14 tháng 11 2017

Đáp án B

Có thể suy ra từ đoạn văn Kỉ nguyên của loài bò sát kéo dài _______
A. 200 triệu năm
B. 135 triệu năm
C. 80 triệu năm
D. 65 triệu năm
Từ câu đầu bài đọc, ta biết Kỉ nguyên loài bò sát chính là thời kì tồn tại của khủng long. Như vậy cần tính thời gian chúng tồn tại.
Khủng long xuất hiện vào 200 triệu năm trước, và tuyệt chủng vào 65 triệu năm trước. Từ đó ta tính được chúng tồn tại trong 135 triệu năm, cũng chính là thời gian tồn tại của Kỉ nguyên loài bò sát.

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LQ

Lê Quỳnh Anh

11 tháng 2 2017

Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions. Dinosaurs were reptiles that lived during a period of earth’s history called the Mesozoic Era, which is known as the Age of Reptiles. The first dinosaurs appeared more than 200 million years ago. For many millions of years, they dominated the land with their huge size and strength. Then about 65 million years ago, they died out rather suddenly,...

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#Mẫu giáo

1

DH

Dương Hoàn Anh

11 tháng 2 2017

Đáp án A

Từ “ones” trong đoạn nói đến _________
A. khủng long
B. hàng triệu
C. thằn lằn
D. cá voi
Ta đọc lại 2 câu trước đó, đều là nói về khủng long. Ones ở đây được sử dụng để thay thế khủng long nhằm tránh lặp.

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