题目内容
According to the new traffic rule, when there are people walking at the zebra crossing, cars and buses ______ wait and let them go first.
A.can B.must C.needn’t D.may not
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题目内容
According to the new traffic rule, when there are people walking at the zebra crossing, cars and buses ______ wait and let them go first.
A.can B.must C.needn’t D.may not