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

发布时间：2020-08-17 13:30:39

Test takers      remain in their seats until all the exam papers have been collected.
A. can
B. could　
C. shall
D. would

网友回答

A. can
B. could　
(答案→)C. shall
D. would
解析：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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