— Where is John? — He _____ in the library.
#90206
A
should be
B
must be
C
can be
D
must have been
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The manager demanded that the task ______ within a week.
#87298
A
must complete
B
would be completed
C
be completed
D
must be completed
----Carol Walker didn’t turn up last time ,did she ? ----No .She _______.We had changed our plan .
#89827
A
shouldn’t have come
B
needn’t have to come
C
didn’t need to come
D
needn’t have come
. --- Did you often e-mail your family during the first year at university? --- No. I was so busy meeting new people that I didn’t write to my family as I _____.
#88090
A
ought to
B
should do
C
should have written
D
should have
Cars play an important role in modern life, but they_______also cause many problems like air pollution．
#89014
A
should
B
can
C
must
D
Will