Look! The light in the room is still on. Mr. Liuat work.[ ]A. mustB. can't beC. must beD. have

题目简介

Look! The light in the room is still on. Mr. Liuat work.[ ]A. mustB. can't beC. must beD. have

题目详情

Look! The light in the room is still on. Mr. Liu          at work.
[     ]
A. must
B. can't be
C. must be
D. have to be
题型:单选题难度:中档来源:期末题

答案

C

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