–Do you think Professor Smithbe in the lab?--I’m not sure.A. mustB. shall C. needD. can

发布时间：2020-08-16 08:20:51


–Do you think Professor Smith    be in the lab?
--I’m not sure.
A. must
B. shall
C. need
D. can

网友回答

A. must
B. shall
C. need
(答案→)D. can
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