It is essential that all these figures______twice.

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问题 It is essential that all these figures______twice.

选项 A、being checked
B、are checked
C、checked
D、be checked

答案D

解析句意：把所有这些数据检查两遍是很有必要的。虚拟语气题。在It is necessary／essential／important that从句中，从句谓语动词需用“(should)+动词原形”的形式，should可以省略。故选D。

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