单项选择题

Bill is an example of a severely disabled person who has become（）at many survival skills.

A. proficient
B. persistent
C. consistent
D. sufficient

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单项选择题
The character armor consists of defensive character traits, like arrogance or apprehensiveness, that developed in childhood to（）painful feelings.

A. turn aside
B. ward off
C. bread up
D. watch over
单项选择题
．Before Columbus set sail on his first voyage of discovery, many pooh-poohed his chances, and were unwilling to（）on his chances of success

A．make bets
B．make the bet
C．make a bets
D．make bet
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