________ more careful, his ship would not have sunk. 
#89375
A
If the captain were
B
Had the captain been
C
Should the captain be
D
If the captain would have been
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She________the opportunity,but unfortunately she just let it go.
#86619
A
should have taken
B
must have taken
C
needn't have taken
D
can't have taken
 Michael ______ be a policeman, for he is much too short.
#89354
A
needn’t
B
can’t
C
should
D
may
There ia no light in the room. They ___ asleep.
#88909
A
should have gone to
B
must be
C
could go
D
might be going