2. 外语
  3. No other drug is available at present ______ can produce the same therapeutic effect with less risk.

No other drug is available at present ______ can produce the same therapeutic effect with less risk.

admin2014-09-19  8
问题 No other drug is available at present ______ can produce the same therapeutic effect with less risk.
选项 A、that
B、than
C、when
D、as
答案A
解析 that引导定语从句修饰drug。由于后置定语较长而谓语很短，为了使结构匀称和协调自然，便把定语移至谓语之后，因而造成了中心词与其定语的分隔现象。考生应熟悉这种分隔现象，以免造成语义上的误解而做出错误选择。
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