It is requested that every student__________ a paper on sustainable development.

A．writes

B．wrote

C．writing

D．write

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参考答案

【译文】所有学生都被要求写一篇关于可持续发展的文章。
【考点】虚拟语气
【解析】在表示要求、命令、建议等动词后面的从句中，从句中的谓语动词应该用“(should)+动词原形”的形式，故选D。

1 Under no condition alone in that large quiet house.

A．his mother will be left

B．will not his mother be left

C．his mother won't be left

D．will his mother be left

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2 This building is 4 times as (high) __________ as that one.

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3 She opened the door quietly so as (not disturB．__________the sleeping child.

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