单项选择题

He had tried to ______ sleep by all his usual methods, but with no success.

A．secure
B．induce
C．impact
D．infer
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单项选择题
We do not mean to be disrespectful when we refuse to follow the advice of our leader.
A．venerable
B．respectful
C．famous
D．gracious
单项选择题
He was so ______ at tying fisherman's flies that he was asked to demonstrate his technique at sports fairs and exhibitions.
A．applicable
B．adroit
C．fancy
D．impressed
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