单项选择题

（）, they waved again and again to us.

A. When leaving
B. To leave
C. Being leaving
D. Having left

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We go to the pizza parlor all the（）

A. afternoon
B. time
C. day
D. hours
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There are so many restaurants along the street that I'm not sure which one（）

A. to be eating at
B. to eat at
C. eating at
D. for eating at
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