1. I lose the key, so I cannot get into the house.
-> If ___________________________________________
2. They are too young to join the army.
-> They are not _______________________________
3. She won't come unless you invite her
-> If ___________________________________________
4. We can't hang the picture on the wall. It is heavy.
-> The picture ________________________________
5. They were tired. They were hungry.
-> They were not only __________________________
6. They finish their work. They went home.
-> Finishing ____________________________________
7. She goes out in the rain. She gets wet.
-> If ___________________________________________
8. Tom can't lift the table. He isn't strong enough.
-> Tom is __________________________________
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1.Xin chào
2: Bạn cần: một cây nến, một bật lửa, một tô nước.
3Thực hiện: Người làm thí nghiệm sử dụng cây nến có đường kính 22 mm và cắt bớt sao cho có độ dài bằng độ sâu của tô nước. Trước tiên, đốt nến và nhỏ giọt nến đang tan chảy xuống đáy tô, sau đó thổi tắt lửa và cắm thẳng cây nến vào trong tô. Để nến khô trong 5 phút, nến sẽ dính chặt hơn, khi nhấc nến có thể nhấc theo cả tô.
Tiếp theo, đổ nước vào tô cho đến khi mực nước thấp hơn đỉnh nến một chút. Đợi nước phẳng lặng, dùng bật lửa đốt nến.
Bạn sẽ quan sát thấy khi nến cháy đến ngang mực nước, nó bắt đầu chỉ tan chảy phần trong lõi, phần bên ngoài vẫn giữ nguyên độ cao giúp lửa không bị tắt.
4: Giải thích: Nếu bạn đốt nến trong một tô không có nước, nó sẽ cháy như bình thường, tiêu thụ toàn bộ cây nến.
Tuy nhiên, mọi chuyện không xảy ra tương tự khi nến bị bao quanh bởi nước. Nước lạnh có đặc tính hấp thụ nhiệt năng rất tốt. Khi nhiệt năng của ngọn nến tiêu tan trong nước, nhiệt tác động vào mặt ngoài của nến (phần tiếp xúc trực tiếp với nước) kém hơn, do đó nó không bị tan chảy như bình thường. Ngọn lửa sẽ hạ dần xuống thấp hơn bề mặt nước, trong khi vỏ nến vẫn cao ngang mặt nước như một bức tường bảo vệ, giúp lửa không bị tắt.
1. She doesn't work hard, she can't pass the exam
If she work hard , she can pass the exam
2. Hoa isn't well today , so she can go to school
If Hoa well today , so she can go to school
3. Ba studies hard , he can get a good job
If Ba doesn't study hard , he cannot get a good job .
4. Nga is lazy , she get bad marks
If Nga isn't lazy , she doesn't get bad marks .
6. She didn't get up early , so she didn't go to school on time
If she hadn't got up late , she wouldn't have gone to school on time
@ Chắc sai hết rồi ! Xinloi nhé
1 Complete the sentences withmissing preposition of place.
1 Who is that boy sitting.....with...........Ann and Liz?
2 There were many beautiful flowers......in...the garden.
3. We used to live.....on..........the third floor.
14 Bob is writing ......on...the copy book
15. There is such a mess.....in.......the kitchen!
9 A lot of stars are..with.....us
1 Complete the sentences withmissing preposition of place.
1 My mother's portrait is in the fireplace.
2 Is.the left there is a window
3 We had dinner is a very nice restaurant.
4 The dinner will be for .Mark's
5 The cat is sleeping on the sofa
6. A big lamp is hanging on the table.
7 The taxi will be waiting at the hotel.
8. There is a beautifful garden right the back of the house.
9 Go the left you can see a monument
10. He was sitting at the top of the stairs
1 Complete the sentences withmissing preposition of place.
1 My mother's portrait is...ON...................the fireplace.
2.............................the left there is a window
3 We had dinner..............IN..........a very nice restaurant.
4 The dinner will be ...............Mark's
5 The cat is sleeping..ON........the sofa
6. A big lamp is hanging..........BEHIND......the table.
7 The taxi will be waiting................the hotel.
8. There is a beautifful garden...................the back of the house.
9.......................the left you can see a monument
10. He was sitting.................the top of the stairs
CÁI NÀY LÀ THÊM NƠI CHỐN MÀ NHỈ ==" SAO THÊM VÀO THẤY KO HỢP LÝ CẬU Ạ ==' CÓ THIẾU ĐỀ KO?
nhưng cũng có khản năng tớ ngốc :"
1. I was stuck at that traffic jam for hours! ...I've been stuck in traffic for hours!..................
2. There were no clouds on the sky .........No clouds in the sky .....................
3. Matthew was in work when I called ..........Matthew was working when I called ...............
4. Megan will be on the office from nine to four. ............Megan will be in the office from nine to four hours. ...................
5. Rachel is to her desk .............Rachel arrives at her desk .................
6. There will be many new people on the party .........There will be many new people at the party .................................
7. The food is in the table ........Food on the table .......................
8The keys were not to his pocket. ............The key is not in his pocket. .......................
9. She looked in herself and smiled happily ..........She looked at herself and smiled happily ..................
10. The books were at the shelf ...........the books are already on the shelf....................
Tự làm nên ko biết đã đúng chưa đâu -.-"
1, Computer studies / Ba's favourite sudject.
--->............ Ba's favourite sudject is ...computer studies .........................................
2, Students / live / study / boarding school.
--->...........The ...Students live and study in the .... boarding school...............................................
1. I lose the key, so I cannot get into the house.
-> If I didn't lose the key, I could get into the house.
2. They are too young to join the army.
-> They are not old enough to join the army.
3. She won't come unless you invite her
-> If you don't invite her, she won't come.
4. We can't hang the picture on the wall. It is heavy.
-> The picture too heavy to hang on the wall
5. They were tired. They were hungry.
-> They were not only tired but also hungry
6. They finish their work. They went home.
-> Finishing their work then they went home
7. She goes out in the rain. She gets wet.
-> If she didn't go out in the rain, she wouldn't get wet
8. Tom can't lift the table. He isn't strong enough.
-> Tom is too weak to lift the table
1. I lose the key, so I cannot get into the house.
-> If I didn't lose the key , I could get into the house
2. They are too young to join the army.
-> They are not old enough to join the army .
3. She won't come unless you invite her
-> If you don't invite her , she won't come
4. We can't hang the picture on the wall. It is heavy.
-> The picture is too heavy for us to hang on the wall .
5. They were tired. They were hungry.
-> They were not only tired but also hungry .
6. They finish their work. They went home.
-> Finishing their work , then they went home .
7. She goes out in the rain. She gets wet.
-> If she didn't go out , she wouldn't get wet .
8. Tom can't lift the table. He isn't strong enough.
-> Tom isn't strong enough to lift the table