单项选择题

Difficulties and hardships have ______ the best qualities of the young geologist.

A．brought up
B．brought out
C．brought about
D．brought forth
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单项选择题
My father is good at solving this kind of problem. If only he ______ here!
A．were
B．will be
C．was
D．is
单项选择题
Somebody has disclosed the secret, ______
A．has he
B．hasn't they
C．hasn't one
D．haven't they
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