按括号中要求转换各句子。

1. The woman in the blue skirt is my mother. (就划线部分提问)

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2. I can see a map on the wall. (改成一般疑问句)

    _________________________________________

3. What colour are your trousers? (写出回答)

    _________________________________________

4. What's this? It's a box. (改成复数)

    _________________________________________

5. The trees are on the hill. (就划线部分提问)

    _________________________________________

6. Who's your English teacher? (按实际情况回答)

     _________________________________________

7. I can find my bike. (改成否定句)

    _________________________________________

8. What are those? They are buses. (改成单数)

    _________________________ ________________

先天性聋哑是由隐性基因控制的遗传病，致病基因在常染色体上。双亲表现型正常，生了一个患该病的女儿，若再生一个孩子表现正常的可能性是（）

A.25%

B.50%

C.75%

D.100%