问题
选择题
—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
答案
答案：B
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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
答案：B