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If the tree hadn't been so high, he _____ it up to take his kite down.
A. could have climbed
B. climb
C. is climbing
D. climbed
If + V(quá khứ hoàn thành), S + would/ could/ might + have + Ved/V3
=>If the tree hadn't been so high, he could have climbedit up to take his kite down.
Tạm dịch:Nếu cái cây không quá cao, anh ấy đã có thể trèo lên để lấy con diều xuống. (Thực tế là cái cây quá cao và anh ấy đã không thể trèo lên để lấy con diều xuống được.)
Đáp án cần chọn là: A
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It was much colder than we had thought. _____ we had taken more warm clothes.
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George won't lend you and money_____ you promise to pay him back.
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If he________exercises, he________play soccer.
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If I________money, I________a new uniform.
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Were he ten years younger, he _____ part in the voyage around the world.
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Do you think there would be less conflict in the world if all people ______ thesame language?
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_____ the boat leaves on time, we will arrive in Paris by the morning.
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If I had known you were asleep, I __________so much noise when I came in.
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If you ________ enough sleep, you ________ a headache.
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She acted as if she _________ him before.
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If I __________the same problem you had as a child, I might not have succeededin life as well as you have.
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If water is heated to 100oC, it________to steam.
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She says if she _____ that the traffic lights were red she _____.
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Unless you __________all of my questions, I can’t do anything to help you.