单项选择题

Peter is one of the few persons I know who ______ learnt from experience.

A) has
B) was
C) had
D) have
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The answer must ______ finding new sources of energy.
A) happen to
B) turn out
C) lie in
D) lay in
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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