He commanded that all the gates _____when it was getting dark in case thieves came in .   
#86782
A
were shut
B
must be shut
C
could be shut
D
be shut
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—Hi, Tom . Any idea where Jane is?—She _____in the classroom . I saw her there just now.
#90418
A
shall be
B
should have been
C
must be
D
might have been
I________through that bitter period without your generous help.
#86828
A
couldn't have gone
B
didn't go
C
wouldn't go
D
hadn't gone
Had I known about this computer program, a huge amount of time and energy________.
#87046
A
would have been saved  
B
had been saved
C
will be saved
D
was saved
The boy         the first prize, but he was so careless as to make a foolish mistake.
#87720
A
must have gained
B
need have gained
C
could have gained
D
shall have gained