[ Gerunds as Objects of Prepositions ]
People always complain _____ not having enough free time.
A. for
B. about
C. to

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Grammar › ViewThe climbers finally reached the ………. of the mountain.
A. top
B. height
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This is the hair that is on the body of an animal.
A. teeth
B. fur
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A. can
B. must
C. might
D. should
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95% of passengers say they are satisfied ____ the bus service.
A. with
B. for
C. at
D. on