I’m really tired of Tom because he ______ keep asking silly questions. 
#62705
A
can
B
will
C
must
D
would
推荐题目
 I felt surprised that anyone of his intelligence   ________  such an easy test.
#62347
A
might have failed
B
could have failed
C
should have failed
D
must have failed
Alice    be at school because she phoned me from her home a minute ago.
#76102
A
mustn’t
B
isn’t able to
C
may not
D
can’t