动词的适当形式填空。

1. My cousin _______( come) to my house last week.

2. How often ______ your brother _______(exercise)?

3. He usually _______(surf) the Internet.

4. My family usually _______(watch) TV after dinner.

5. Her friend enjoys _______(do) morning exercises every day.

6. It’s easy _______(keep ) healthy.

7. My mom wants me _______(drink) milk every day.

8. She likes junk food, but she _______(try) to eat it only once two weeks.

9. I went _______(shop) with my mother for my grandparents last weekend.

10. Let me help you ________(open)the window.

右侧主支气管较粗短，且与气管纵轴所成的角度较小，故异物容易进入右主支气管。（）