单项选择题

The real trouble () their lack of confidence in their abilities.

A. lies in
B. lies on
"C. results in
D. leads to

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单项选择题

On the end of his nose was a () of thick glasses.

A. pair
B. set
C. couple
D. suit

单项选择题

I'm rather anxious () her, for I haven't heard from her for a long time.

A. toward
B. about
C. in
D. over

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