A. does        
B. to do          
C. doing       
D. did

1. How ________ (more) salt will you put in the dish? Only a little.
2. Tina__________(buy) some interesting souvenirs for kids on her trip to China.
3. I spent half an hour________ (make) a bottle of delicious apple smoothie. How happy I was.
4. Fifteen minutes is enough for you ________ (cut) up some tomatoes.
5. You need ________ (add) some red sugar to the soup. It's really strong!
6. Why not ________ (turn) off the TV? You have lots of homework to do.
7. Would you like some ________ (butter) on the bread?
8. He worries about ________ (get) there in time, because he doesn't have a bike.
9. It's easy for her ________  (work) out the math problems.
10. ________  (wait) for someone for a long time often makes me feel tired.

A. to bring   
B. bring   
C. brought  
D. brings

A. to have    
B. have   
C. having

A. for go    
B. to going    
C. to go

A. being    
B. you to be   
C. to be

1. Han Mei enjoys ____  (sing) in English.    
2. Let me help you ____ (find) them.
3. ____ (swim) is the best sport in summer.  
4. Are you ____ (go)  ____ (hike) this Sunday?
5. We decided ____ (go) for a field trip with some friends of ours.

A. go ; go
B. to go; go
C. go; to go
D. to go; to go

A. take            
B. taking        
C. to take              
D. took

A. to fly, on               
B. to fly, /
C. flying, in              
D. flew, at