c is right. When a noun is specific, using of after all is optional; when a noun is nonspecific, of does not follow all.

tsinghua (tsinghua)
(#250737@0)
2001-11-6 -05:00

回到话题: 请教大家一道TOEFL语法题:____ballet dancers learn five basic positions for the arms and feet. (a)All of (b)Of every (c)All (d)Every 到底选A还是C啊?有什么不同?请赐教!

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