按要求完成下列句子，每空一词。

1. The boys used to swim in the river. (改为否定句)

    The boys _____ _____ to swim in the river.

2. Li Lei learnt English all by himself. (改为同义句)

    Li Lei _____ _____ English.

3. I used to go swimming in the summer vacation. (改为一般疑问句并作肯定回答)

    _____ you _____ _____ go swimming in the summer vacation?

    _____, I _____.

4. He used to play computer games.(对画线部分提问)

    _____ _____ he _____ _____ do?

5. I like reciting poems! (改为同义句)

    I _____ _____ of reciting poems!

JGJ59-99《建筑施工安全检查标准》分值最高的一项是文明施工20分。这就表明文明施工是安全达标的一项重要内容，具有强制性。