按照目前物理学研究的最新成果，构成物质的最小单位是：

A．纳米

B．质子

C．中子

D．夸克

句型练习。（10分）

1. His mother is 37 years old. His father is 37, too. (合并为一句)

His mother is                                           his father.

2. This book is not popular. I like it. (合并为一句)

                this book isn’t popular, I like it.

3. I have known the man for five years.（对划线部分提问）

                               have you known the man?

4. He has to go there by bus. （完成反意疑问句）

He has to go there by bus,                                ?

5. She rides a bike to school.  (改为同义句)

She goes to school                              .