—Where is Xiao Wang?  —I don't know.He__________ be in the library.
#90382
A
can
B
must
C
might
D
may
推荐题目
I__________ you somewhere before, but your name has escaped me_________.
#90025
A
must see;for a moment
B
must have seen; for a moment
C
must see;for the moment
D
must have seen; for the moment
Great efforts to increase grain production       if food shortages are to be avoided.
#88013
A
could be made
B
must be made
C
might be made
D
would be made
If you really want yourself to be in good health, you must ___ always ___ so much.
#90202
A
not; be smoking
B
not; have smoked
C
not; to smoke
D
be not; smoking