They wonder________robots will make humans lose their jobs or not
A. that                   B. if                   C. whether
C
that那個(gè)，引導(dǎo)賓語從句不做句子成分，只起引導(dǎo)作用；if是否，如果；whether是否。句意：我想知道機(jī)器人是否會讓人們失去他們的工作。在表示是否時(shí)，whether常和or not搭配使用，故選C。
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