--Where is Xiao Wang?--I don't know. He__________ be in the library.
#90015
A
can
B
must
C
might
D
may
推荐题目
 I _____ you would come today. You _____ me a phone call in advance.
#90156
A
don’t expect; should have given
B
didn’t expect; could have given
C
hadn’t expected; ought to give
D
didn’t expect; can have given
Water ____ be changed into vapour but it ____ be heated to its boiling point . 
#89755
A
may ; can
B
can ; must
C
may ; needn''t
D
must ; may
You _____ an A on your composition, but there were some spelling mistakes.
#87445
A
should receive
B
could have received
C
would receive
D
must have received
Teachers recommend parents ______their children under 12 to ride bicycles to school for safety.
#87374
A
not allow
B
do not allow
C
mustn’t allow
D
couldn’t allow