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—What are computers used for by traffic police in your city?
—              the traffic running in a better way.

A. Helping
B. Keeping
C. Making
D. Letting
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科目：初中英語 來源：同步題 題型：單選題

—What are computers used for by traffic police in your city?
—              the traffic running in a better way.
[     ]
A. Helping
B. Keeping
C. Making
D. Letting

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