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标题: prep1-152求教 [打印本页]

作者: cx_ding 时间: 2009-11-15 14:01
标题: prep1-152求教
Recent research indicates that two popular arthritis drugs are possibly not as safe as they initially

believed.

(A) that two popular arthritis drugs are possibly not as safe as they initially believed

(B) that two popular arthritis drugs may not be as safe as they were initially believed to be

想请教一下，A错误的原因是they initially believed用的是主动语态。这里不能被认为是省略了be动词，因为前后be动词时态不一致。

是不是这样理解？如果前后时态一致，则A选项是不是更好一点。

作者: shiwen66666 时间: 2009-11-15 14:41
as ...as前后要对称，所以不能像A一样只是借用前句的are。

这道题Ａ，Ｂ项as后主要不同就是主被动，算是给出的提示要注意主被动

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