用所给词的适当形式填空。

1. This book is yours, _____ (I) is at home.

2. English is _____ (important) than math.

3. Could you please _____ (clean) your room? It's too dirty.

4. Donna is famous for _____ (sneeze) .

5. Selina likes a comedy _____ (call) Mr. Bean.

6. It's time for class.Please stop _____ (talk)

7. You'd better _____ (not go) out of the house.

8. She likes to have friends who are _____ (difference) from her.

9. My hair is shorter than _____. (she)

10. The most popular way of _____ (get) to school is walking.

进行油的反应试验时，要将除盐水煮沸以除掉水中的（）。

A.O₂

B.CO₂

C.N₂