甲、乙、丙三个数的平均数是12，甲：乙：丙=3：4：5，甲是______

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问题填空题

甲、乙、丙三个数的平均数是12，甲：乙：丙=3：4：5，甲是______，乙是______．

答案

甲数是：

12×3×

3+4+5

=9，

乙数是：

12×3×

3+4+5

=12．

故答案为：9，12．

完形填空

二、句型转换 ( 10分)

1. They pretended that they were barbers.

They pretended ____________ ______________ barber.

2. Honestly speaking, I don’t want to stay here any longer.

________ ________, I don’t want to stay here any longer .

3. In fact, I landed in Britain by accident．

In fact, I _________ ____________ land in Britain.

4. Because of the bad weather, a few students were absent from school.

The bad weather _________ __________ a few students’absence of school.

5. It would be wrong that I don’t trust a gentlman.

It would be wrong ________ me ________ _________ trust a gentlman.

填空题

已知等腰△ABC内接于半径为5的⊙O，如果底边BC的长为8，则BC边上的高为（）。