If , the bird flu would produce a powerful poison that would kill the patients． [ ] A．not treat B．not treated C．untreated D．both B and C 题目和参考答案——青夏教育精英家教网—

题目内容

If ________, the bird flu would produce a powerful poison that would kill the patients．

[　　]

A．not treat

B．not treated

C．untreated

D．both B and C

答案：D
提示：

如果主句的主语和从句的主语同指一个人或物，那么从句的主语和be可以省略，此句就是这样。

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