问题 选择题

Test takers _______ remain in their seats until all the exam papers have been collected.

A.can

B.could 

C.shall

D.would

答案

C

shall作情态动词用于第二、三人称时,表示“许可、允诺、命令、强制”,shall在该句中表“强制”。

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问答题 计算题