In the 19th century new methods of transportation, in particular canals and railways, _______ for transporting goods from places to places
A. are developed
B. were developed
C. have been developed
D. had been developed
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Đáp án B.
Giải thích: Hành động xảy ra hoàn toàn trong quá khứ - thế kỉ 19 - nên ta dùng thì quá khứ đơn.
Dịch nghĩa. Vào thế kỉ 19, những phương tiện giao thông mới, đặc biệt là kênh đào và tàu hỏa, được phát triển cho việc vận chuyển hàng hóa giữa các vùng.
Complete the passage with the suitable words.
Health is something we tend to ignore when we have it. When our body is rather well, we're hardly ever (1) ..aware........ of it. But illness can come, even (2) .......when.... we are young. In fact, childhood has been a very vulnerable time. Many (3) ....diseases.... attacked children in particular and people knew very little about how to prevent such illness or how to (4) ...cure..... them once they struck. The resuft was that many children died. About century ago, however, scientists found out about germs, and then everything (5) .....changed... The cause of many diseases (6) ......was.. known, and cures were developed. As this medical knowledge spread the world became (7)......much.... safer for children. The resuft is that whereas a hundred years ago the average man lived for 35 years. Nowadays, in many places of the world, people can expect to (8)......live..... for years. And what do we except by the years 2010 ? Undoubtedly, (9)...medical.... science will continue to advance. Some people will be able to (10)......solve.... medical problems that are unavoidable today.
Health is something we tend to ignore when we have it. When our body is rather well, we're hardly ever (66) ..aware..of it. But illness can come, even (67)....when.... we are young. In fact, childhood has been a very vulnerable time. Many (68).diseases....attacked children in particular and people knew very little about how to prevent such illness or how to (69).cure... them once they struck. The result was that many children died. About century ago, however, scientists found out about germs, and then everything (70)...changed.... The cause of many diseases (71)...were.. known, and cures were developed. As this medical knowledge spread the world became (72)..much... safer for children. The result is that whereas a hundred years ago the average man lived for 35 years. Nowadays, in many places of the world, people can expect to (73)..live... for years. And what do we except by the years 2010? Undoubtedly, (74) ..medical... science will continue to advance. Some people will be able to (75) ....avoid.. medical problems that are unavoidable today.
Đáp án B Hành động đã xảy ra hoàn toàn trong thế kỉ 19 (In the 19th century) -> chia quá khứ đơn