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【题目】They wonder________ robots will make humans lose their jobs or not.

A.that B.if C.whether

【答案】C

【解析】

试题分析:that那个,引导宾语从句不做句子成分,只起引导作用;if是否,如果;whether是否。句意:我想知道机器人是否会让人们失去他们的工作。在表示是否时,whether常和or not搭配使用,故选C

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