用must,might,could或can't填空
5.I don't know. It_________ _ be a stick.
科目:初中英语 来源: 题型:
( )1. We _____ _ to close the windows before we left the lab.
A. tell B. told
C. are told D. were told
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科目:初中英语 来源: 题型:
Look at the light in the room ! There must be someone_______ in the office.
A. working B. to work
C. worked D. work
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