Question

【题目】Please be quiet! The students an exam.

A. take B. are taking

C. took D. were taking

Answer 1

【答案】B

【解析】句意：请安静！学生们正在参加考试。A. take一般现在时；B. are taking现在进行时；C. took 一般过去时；D. were taking过去进行时。根据“Please be quiet!”可知暗示现在的时间，此句时态使用现在进行时，故选B。