1. Let's stop _____ (have) a rest.
2. Please stop _____ (talk). The teacher is coming.
3. He is too young _____ (go) to work.

1.I'd like you _____ (meet) my family.
2. Li Ming's report is _____ (good) than Wang Mei's.
3. Do you like the _____ (twelve) lesson?
4. We always enjoy _____ (we) on Sunday.
5. They are going to do some _____ (shop).
6. When she was young, she always _____ (keep) her room clean.
7. The students _____ (be) busy now.
8. I _____ (be) ill last week.
9. My father _____ (leave) for Beijing in an hour.
10. Listen! Mary _____ (sing) in the next room.

1. I Would like seeing them too.      
     _________________________  
2. Thank you for to help me.      
     _________________________   
3. Look at the clouds. It rains.      
     _________________________  
4. We are going on a trip if it won't rain tomorrow.      
     _________________________  
5. Who have the biggest banana?    
     _________________________ 
6. Do they free this Saturday?    
     _________________________

A. buy 
B. buys    
C. buying     
D. to buy