When Marx was in London, he _____ read at the library for hours.
#90099
A
would
B
might
C
could
D
should
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He said that he would write to us but so far we ___________ from him.
#87738
A
didn’t hear
B
haven’t heard
C
shouldn’t have heard
D
hadn’t heard
— Catherine, I have cleaned the room for you. — Thanks. You ______ it. I could manage it myself. 
#90498
A
needn’t do
B
needn’t have done
C
mustn’t do
D
shouldn’t have done
 If we ______ day before yesterday, we would have done the job.
#86719
A
hadn't been interrupted
B
weren't being interrupted
C
wouldn't be interrupted
D
weren't interrupted