乙型肝炎慢性化的原因中下列哪项可除外

A．病毒发生变异，导致免疫逃逸

B．母婴传播或幼儿期感染，导致免耐受

C．病毒基因整合于宿主基因组中

D．乙型肝炎病毒是血液体液传播

E．病毒感染宿主免疫细胞，导致免疫功能下降

改写句子。

1. They are going to be teachers when they leave Beijing Normal School.

( 提问)

_______ _______ they going ______ _____ teachers?

2. I am going to make a soccer team when I grow up.(用My brother改写)

My brother ______ _______ to make a soccer team when _______

_______ up.

3. I am going to Beijing in 2008.(提问)

_______ ______ _______ _______ in 2008?

4. My father says he is going to live in a beautiful place when he retires.

(同义)

My father says he is going to live in________ _______ when he retires.

5. She did some hard work last week. (否定)

She _____ ______ _______ _____ hard work last week.