If we ___________some measures, we might have prevented the environmental pollution．
#87466
A
take
B
had taken
C
took
D
have taken
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— Hi, Tom．Any idea where Mary is? ．一 She ______in the reading room．I saw her there just now．
#87498
A
shall be
B
should have been
C
should be
D
might have been
My mother ________ always wave goodbye to me while I was leaving for school.
#87627
A
should
B
must
C
could
D
would
I’m most awfully grateful to you. I can’t think what I ________ without you.
#87709
A
could do
B
would do
C
should have done
D
must have done
——I can’t find my MP4 player. —— You _______it on the desk. I saw a red one on it.
#87882
A
might have put
B
can put
C
need have put
D
must put
Often, when he ______ something that ______ him, he wasted his time drawing some little pictures.
#89280
A
should be doing; gave
B
should have been doing; was given
C
should do; was given
D
should have been doing; had given