用括号中所给词的适当形式填空

1. It's important for us __________(learn) English.

2. Can you go __________(shop) with me this weekend?

3. Mary's uncle __________(take)  her to Hong Kong three months ago.

4. Beijing and Xi'an are the names of two big __________(city) in China.

5. December is the __________(twelve) month of a year.

6. The baby __________(stop) crying and listened to music.

7. He works very hard __________(improve) his English.

8. Her mother is often __________(worry) about her.

9. He __________(be) 14 years old next week.

10. I often hear the girl __________(sing) beautiful songs at home.