Ms．Chen thought that her idea for a new washing machine could be a profitable ________ ．

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问题 Ms．Chen thought that her idea for a new washing machine could be a profitable ________ ．

选项 A、invents
B、invent
C、inventor
D、invention

答案D

解析陈女士认为她关于新洗衣机的设想是一项利润较高的发明。空格前面有a，判断此处填入名词，排除A、B。“inventor”发明者，用于人；“invention”发明，因此选D。

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