单项选择题

Joan is in the dorm, putting the final ____ to her speech.

A．details
B．remarks
C． comments
D．touches
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单项选择题
There were 150 ____ at the international conference this summer.
A．spectators
B．viewers
C．participants
D．onlookers
单项选择题
During the summer vacation, kids are often seen hanging _____ in the streets.
A．about
B．on
C．over
D．out
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