单项选择题

Let's stop over here （）for a while. It's hard to have a conversation while running

A. talking
B. to talk
C. talked
D. for talking

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Please stop complaining （）the problem and start looking for solutions

A. for
B. at
C. about
D. 什么都不填

单项选择题

Pam works in a company but her dream is （）a successful business owner

A. being
B. to be
C. to being
D. been

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