问题
选择题
You must always ______ the traffic whenever you are in a crowded city.[ ]
A. look out
B. watch out for
C. look at
D. watch over
答案
答案：B
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You must always ______ the traffic whenever you are in a crowded city.[ ]
A. look out
B. watch out for
C. look at
D. watch over
答案：B