Walking exercises ____ be boring at times, but on a clear sunny morning nothing could be better．
#63356
A
may
B
will
C
must
D
should
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He have completed his work; otherwise, he wouldn’t be enjoying himself by the seaside.
#62185
A
should
B
must
C
wouldn’t
D
can’t
It is hard to say what kind of person he is．Sometimes he is very friendly; at other times he ___ be very cold．
#62687
A
can
B
must
C
will
D
shall
You ___ drink wine before driving, or the police will take your license away.
#75332
A
don’t have to
B
needn’t
C
mustn’t
D
may not