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In 2000, a mere two dozen products accounted for half the increase in spending on prescription drugs, a phenomenon that is explained not just because of more expensive drugs but by the fact that doctors are writing many more prescriptions for higher-cost drugs.

正确答案: B

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GWD-5-Q39

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楼主
发表于 2005-3-21 20:31:00 | 只看该作者

GWD-5-Q39

GWD—5—Q39:

In 2000, a mere two dozen products accounted for half the increase in spending on prescription drugs, a phenomenon that is explained not just because of more expensive drugs but by the fact that doctors are writing many more prescriptions for higher-cost drugs.







  1. a phenomenon that is explained not just because of more expensive drugs but by the fact that doctors are writing
  2. a phenomenon that is explained not just by the fact that drugs are becoming more expensive but also by the fact that doctors are writing
  3. a phenomenon occurring not just because of drugs that are becoming more expensive but because of doctors having also written
  4. which occurred not just because drugs are becoming more expensive but doctors are also writing
  5. which occurred not just because of more expensive drugs but because doctors have also written

这题我看了很久。从句意上C的not...but...表示:不是...而是...。好象更接近题意。但对其中的occurring 和doctors having also written有又不太确定。


请指教!

沙发
发表于 2005-3-21 21:39:00 | 只看该作者

occuring 表示主动和持续,phenomenon 是自己发生的,不依于外界力量,不能用 occured.

having written 的动作发出者是 doctors, 不是被动发生的,不能用过去完成时。

板凳
发表于 2005-3-27 21:17:00 | 只看该作者

but also中间是不能插入其他成分的;

n+having done是绝对错误的,参见Lzm语法

地板
 楼主| 发表于 2005-3-29 21:19:00 | 只看该作者
明白了!
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