下列说法正确的是（　　）

A．二氧化碳易溶于水，所以不能用排水法收集

B．使燃着的木条熄灭的气体一定是二氧化碳

C．二氧化碳能向液体那样从一个容器倒入另一个容器

D．干冰可以直接变成气体，说明不存在液态的二氧化碳

用括号内所给动词的适当形式填空。

1.  Nick often __________ (get) up at 7.00 am. on weekdays.

2.  Lucy and her brother ___________(watch) a film next Sunday.

3.  My sister with her brother enjoys ___________(swim) in summer.

4.  It's time for supper. Come and ___________(have) some fish and rice, please.

5.  Can't you __________ (wait) for the next bus? It's still early now.

6.  _________ Daniel _________ (wear) glasses in class?

7.  There _________ (be) some pictures on the teacher's desk, but where are they now?

8.  Lily always helps her mother         (water) the flowers in the garden.

9.  Listen! Kate __________(sing) in her room now.

10. Hobo __________(fly) a kite every day.