On Saturdays, students are very proud to be on the street to guide passers-by to obey traffic rules.

On Saturdays, students are very proud to be         on the street to guide passers-by to obey traffic rules.

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characters

volunteers

operators

graduates

推荐题目

The two men are______.

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of the same age

same age

an age

of same age

.Symphony means a long piece of music that has three or four parts or ＿＿.

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move

movement

moving

movements

In the meantime, the question facing business is whether such research is ______ the costs.

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worth

worth of

worthy

worthwhile

. In order to learn the _______ of the family business, Bill took a job as messenger boy in one of the offices.

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ins and outs

dos and don’ts

heads and tails

p’s and q’s

We need to work faster because time is _____.

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of the essence

of the importance

limitless

countless

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