It's not just a planet, It's home是对地球在太阳系中地位的恰如其分的评价，回答1～2题。

1．地球的特殊性表现在[ ]

A．质量在八大行星中最小

B．既有自转又有公转运动

C．公转方向与八大行星不同

D．是太阳系中唯一有生命物质的行星

2．若地球在海王星的轨道上运行，则会发生的现象有[ ]

A．变为寒冷的“冰球“

B．变为炎热的“火球“

C．大气层将会消失

D．公转方向将变化

根据所给英文写出单词的合适形式。

1. Lily is a good            (swim) because she is the first in the swimming match.

2. We usually brush our teeth            (two) a day .

3. I have a little dog .             (it) nose is white.

4. How long do you spend            (chat) with your e-friends on the Internet every day?

5. Fruit and vegetables are             (health) food.