【題目】 They were all very tired, but _______ of them took a rest.

A. none B. all

C. both D. either

【答案】A

【解析】

試題分析：并列句的前面有all，說明超過二人，排除C、D選項(xiàng)；連詞用了but，有轉(zhuǎn)折的意思，說明累卻不休息，因此后面要用否定詞。故選A。

考查：考查不定代詞的用法。

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