Read and fill in the blanks．（用所给动词  的适当形式填空。）

1. Lucy is going to_____(find)  a book about e-cards.

2.I      (eat) some bread for breakfast yesterday.

3. Can I_______(have) an English book?

4. We_______(are) twelve years old last year.

5.1 want to________(buy)a computer.

近年来，重庆市狠抓清洁能源工程，使二氧化硫的排放量大幅度降低，空气质量有很大改善．去年重庆的空气达到二级和优于二级的天气有207天，占全年的百分之几？（百分号前面保留整数）