句型转换。  

1. She has math at eight o'clock.(改为一般疑问句)

     _____ she _____ math at eight o'clock?

2. They have some sports clubs.(改为否定句)

    They_____have _____ sports clubs.

3. My favorite subject is biology.(对画线部分提问)

    _____ _____ favorite subject?

4. He likes science because it's interesting.(对画线部分提问)

    _____ _____he like science?

5. Mr Wang is our math teacher.(对画线部分提问)

    _____is_____math teacher?

（）是炼铁产生的副产品，炼铁时产生的熔融矿渣用水快速冷却形成的玻璃质的粒状物。

A.泡沫玻璃

B.粉煤灰

C.水淬矿渣

D.炉渣