He pushed the door again and again, but it ___ open.
#89064
A
may not
B
can't
C
didn’t
D
wouldn't
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—We expected you yesterday.—I’m sorry,I ________ you to say that I couldn’t be here until today.
#86479
A
should have called
B
must have called
C
could call
D
would call
If we had taken such effective measures much earlier, the river ________ so seriously now.
#86813
A
is not polluted
B
would not be polluted
C
had not been polluted
D
would not have been polluted
I was so young.  You__________ better than to rely on me
#88037
A
should have known
B
should know
C
must know
D
must have known