1.After finishing his homework,he read some books.
2.I hope his dream of becoming a pianist will come true.
3.我们这个世界有很多穷人.
4.这些学生都是十五岁以下.
5.I was taught by her in this school last year.
6.Paper are used by us widely.
填空(1.2)、解释句子（3.4）、改为被动语态（5、6）
1.After finishing his homework,he read some books.
2.I hope his dream of becoming a pianist will come true.
3.我们这个世界有很多穷人.
4.这些学生都是十五岁以下.
5.I was taught by her in this school last year.
6.Paper are used by us widely.