they were all very tired but --- of them took a resta\ noneb\ allc\ bothd\ either说理由!
问题描述：
they were all very tired but --- of them took a rest
a\ none
b\ all
c\ both
d\ either
说理由!
答
B
三者以上都
both..两者都
either二者任意之一
none=几乎等于nobody
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答
a
他们都很累了 但没有一个休息的
全部否定
答
a 根据句意，but表转折，排除bcd。且从all可知是三者以上，a正确。
答
a.
虽然他们都很累但没人休息。but转折。
答
选择A：none
前面出现了all,说明人数在三个或三个以上,否定要用none