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    精英家教网 > 初中英语 > 题目详情
    They wonder________robots will make humans lose their jobs or not
    A. that                   B. if                   C. whether
    C
    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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