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________has been announced.we shall have our final exams next month.

[  ]

A.That
B.As
C.It
D.What
答案:B
解析:

本题考查学生对非限制性定语从句的运用能力。从句子结构上分,本题前半句是一个非限制性定语从句,从四个选项中分析只有A、D两项为关系代词。这样选择范围缩小,判断难度降低。A项That不能用于非限制性定语从句,故被排除,B项As能引导非限制性定语从句,代替整个主句所表达的内容,并在从句中作主语,故本题答案选B。而C项It迷惑性大,因为它可以构成主语从句,但必须在we前加that。


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