He ______ be in the classroom,I think.

问题描述:

He ______ be in the classroom,I think.
(可多选)
A.may
B.must
C.can
D.should

may
由后面的I think可以知道,这是一个推测,所以应该用表示推测的情态动词,may也许,他也许在教室,我想是的