Question

【题目】—Why are the lights in the teachers’ office still on?

—There ________ be some teachers working there.

A. can B. must C. may D. ought to

Answer 1

【答案】B

【解析】

试题分析：句意：---老师办公室的灯为什么还亮着？---一定有一些老师正在办公室工作。本题考查there be句型的进行时的推测，其结构为there must be+主语+doing 。A. Can能，会；B. Must一定；C. May可以；D. ought to应该。根据题意故选B