It is essential that the application forms (send)______ as early as possible.

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问题 It is essential that the application forms (send)______ as early as possible.

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答案 (should)be sent

解析 本题考查虚拟语气。形容词strange,important,necessary,advisable,impossible,proper,essential,natural等后面接从句时,从句谓语动词用虚拟语气。结构为“it+be+adj.+ that...”,从句的谓语动词是should+do,should可以省略。例如:It is necessary that you (should)be in the meeting.
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