根据首字母提示及句意填入适当的单词。

1. Knowing how to ask for information p_____ is very important.

2. I have left my ruler at home. Could you l_____ me yours?

3. Don't worry. Please tell me what t_____ you most.

4. "No p_____" the sign says.

5. Please open the window to let the f_____ air into the room.

6. The ground s_____ hard during the earthquake.

7. Using the chopsticks to p_____ at others is too rude.

8. — Would you like to have another apple? 

    — Thanks, I am f_____.

9. The r_____ is too hard. No one knows the answer.

10. Please make a m_____ where you don't know the answer.