Question

【题目】Students have rules to keep their classrooms clean.

A. canB. shouldC. needD. may

Answer 1

【答案】B

【解析】

句意：学生需要有保持教室清洁的规则。

A. can能，会；B. should应该；C. need需要；D. may可以。根据to keep their classrooms clean.可知这里是需要有制度。根据题意，故选B。