题目内容
—Peter, keep an eye on your younger brother. It is easy to ______ when babies learn to walk.
—OK, Mum. I will take good care of him.
A.fall over B.fall behind C.get away D.move away
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题目内容
—Peter, keep an eye on your younger brother. It is easy to ______ when babies learn to walk.
—OK, Mum. I will take good care of him.
A.fall over B.fall behind C.get away D.move away