—Is Pro. Smith giving the speech today?—It __________ be him. He is abroad right now.
#87621
A
can’t
B
needn’t
C
won’t
D
mustn’t
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Even though I’d hurt my leg, I＿＿＿＿＿＿ swim back to the river bank.
#89936
A
could
B
might
C
had to
D
was able to
______ smoking, he would not have got cancer in the lung.
#89612
A
Was he given up
B
Had he given up
C
Did he give
D
If he gave up
He ______. It's a shame my mobile phone was power-off.
#90420
A
ought to call me
B
could have called me
C
may be calling me
D
might call me
— Mummy, I have broken my train. 一I told you so. You _______ on it.
#89285
A
mustn't have ridden
B
couldn't ride
C
shouldn't have ridden
D
needn't ride