检验集气瓶中的二氧化碳是否收集满的方法是（　　）

A．将燃着的木条伸入集气瓶内

B．将带火星的木条伸入集气瓶中

C．将少量石蕊试液注入集气瓶内

D．将燃着的木条放在集气瓶口

用所给的信息完成句子。

1. The             (运动员) in the school are having a PE class (体育课)

2. You'll have fun              (使...飞) kites with your friends in the square.

3. The farmer has a lot of              (羊) on his farm.

4. I want to buy a card             (带有) Santa Clause on it.

5. It's             (热)outside than inside in our city.

6.             (跑步) is good for you.

7. I think you can hit the ball              (轻松地).

8. We are in              (不同的) classes.

9. Which team              (赢) the game?

10. How much              (锻炼) do you need?