By the mid-twentieth century,united states presidential staffs,-----had numbered fewer than ten a century eariler,numbered in the hundreds. A as B that they C which D and the answer to this question is C. i know that A.B.D are all wrong.but "which" can present human? sorry, i have no chinese system now,i don't know if i express my meaning clearly.
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发表于 2003-10-28 08:52:00
