It is often difficult to decide who really deserves the credit for (invent) ____

游客2024-07-02 9

问题 It is often difficult to decide who really deserves the credit for (invent) ______ a new device.

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答案 inventing

解析介词后用动名词。

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[originaltext]Whathavethetwospeakersdecidedtodo?[/originaltext]A、Theman