单项选择题

The answer must ______ finding new sources of energy.

A．happen to
B．turn out
C．lie in
D．lay in
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单项选择题
______ had the plane landed than the people ran towards it.
A．No sooner
B．Hardly
C．Seldom
D．Now that
单项选择题
I ______ you the money. Why didn't you ask me
A．would lend
B．could have lent
C．must have lent
D．had lent
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