句型转换：按题后的要求作答，每空一词。

1. This is a bus.(改为复数的句子)

     _____ are _____ .

2. Are the pens yours? (作否定回答)

    No, _____.

3. He has a big nose. (改为一般疑问句)

    _____ he _____ a big nose?

4. My mother is nice with long hair.(对画线部分提问)

    _____ ______your mother look like?

5. Ann's shoes are red and white. (对画线部分提问)

    ____ _____are Ann's shoes?

6. Her hair is long and red. (同义句替换)

    ______ ______long red hair.

慢性唇炎的病因是

A．干燥气候

B．舔唇咬唇不良习惯

C．烟酒、烫食嗜好

D．化学、机械刺激

E．病因不明