按要求转换句子，每空一词。

1. The book cost me ten yuan. (改为一般疑问句) 

    _____the book_____ _____ten yuan?

2. Would you like to wear blue coat? (做出肯定回答)

    _____, I _____ _____ _____.

3. We bought some pens for children. (改为否定句)

    We _____ _____ _____pens for children.

4. They eat fast food once a week. (就划线部分提问)

    _____ _____ _____they eat fast food?

5. They were at school at noon yesterday. (改为一般疑问句)

    _____ _____at school at noon yesterday?

自2009年秋季至今，我国西南地区遭遇旱灾，局部地区遭遇百年一遇的大旱。下列叙述正确的是

A．特旱仅发生在云、贵、川三省

B．该区域旱情严重程度由南向北递减

C．此次旱灾是受副热带高压控制形成的伏旱

D．降水持续偏少、气温偏高是导致旱灾的原因