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She had to work deep into the night, ______she couldn't have spread the messages to all the relevant people successfully.
#86759
A
while
B
but
C
otherwise
D
so
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---Someone’s been here. Who ___ it be? It looks like Helen.---It ___ be Helen.She is ill in hospital.
#88920
A
must; must
B
might; could
C
can; mustn’t
D
can; can’t
Every solid object ______ reflect a sound，varying according to the size and nature of the object．
#87543
A
must
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shall
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will
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— Lucy doesn’t mind lending you her dictionary. — She _______. I’ve already borrowed one.
#90497
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can’t
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mustn’t
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needn’t
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I would rather you ____ it.
#87152
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do
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did
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will do
D
would do
— But for your timely warning, we _____ into great trouble.— Well, you know we’re friends.
#86692
A
would get
B
must have got
C
would have got
D
can’t have got