2. 职称英语
  3. Their factory has developed a kind of ______to help people walk.A、the machineB、

Their factory has developed a kind of ______to help people walk.A、the machineB、

游客2025-06-29  25
问题 Their factory has developed a kind of ______to help people walk.
选项 A、the machine
B、machines
C、machine
答案 C
解析 句意:他们工厂已经研发出了一种可以辅助人行走的机器。 本题考查的是短语a kind of，后面的名词用单数，名词前不加冠词。
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