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?

对出现的险情无法排除，威胁到作战人员的安全时，火场指挥员应及时下达()的命令。

A、发起总攻

B、疏散或转移

C、掩护救人

D、撤退或转移