【題目】There will be robots in the future. But I don’t know if______ are all helpful.

A.theyB.youC.we

【答案】A

【解析】

句意:將來會有機器人。但我不知道他們是否都有用的。

考查人稱代詞。they他們;you你,你們;we我們。本詞指代上文機器人,可知使用they指代;故選A

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