问题
选择题
— Where is John? — He _____ in the library.
A.should be
B.must be
C.can be
D.must have been
答案
答案:B
must do表示对现在的事实进行推测。
— Where is John? — He _____ in the library.
A.should be
B.must be
C.can be
D.must have been
答案:B
must do表示对现在的事实进行推测。