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
If you were offered a trip to the moon,（）it

A. did you accept
B. are you going to accept
C. will you accept
D. would you accept
单项选择题
They always keep on good （）with their next-door neighbors for the children's sake.

A. friendship
B. terms
C. relations
D. relatives
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