请教一道英语单选,北大自主招生题!请说明具体原因.It would be （ ）a risk to let the child go to school by himself.A.following B.passing C.running D.carrying
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请教一道英语单选,北大自主招生题!请说明具体原因.
It would be （ ）a risk to let the child go to school by himself.
A.following B.passing C.running D.carrying
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