Mr Li required the computer equipment referred ________ used in every classroom. 
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A
should be
B
have to be
C
to be
D
to being
推荐题目
 If he ______ my advice, he wouldn’t have lost his job.
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A
followed
B
should follow
C
had followed
D
would follow
We suggest that more measures _________ to solve the problem of overpopulation.
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A
will be taken
B
be taken
C
can be taken
D
must be taken
He is an hour late by now.He         last night.
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A
must stay up
B
should stay up
C
must have stayed up
D
should have stayed up