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the sound on the step, the boy rushed out to see if his mother had come back. A.

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the sound on the step, the boy rushed out to see if his mother had come back. A.

______ the sound on the step, the boy rushed out tosee if his mother had come back.

A.To hear           B.Hearing           C.Heard            D.Hear

 

试题答案

【答案】

B

【解析】

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