1 ate                                             10 cooked

2 saved                                        11 bought

3 gave                                           12 put

4 came                                          13 thought

5 saw                                              14 was were

6 left                                                15 took

7 drank                                           16read   

8 jumped                                        17 went    

9 flew                                              18 listened

I.

1.ate

2.saved

3.gave

4. came

5.saw

6.left

7. drank

8.jumped

9.flew

10. cooked

11.bought

12. put

13. thought

14.was/were 

15.took 

16. read

17.went 

18.listened 

19.stayed

20. met

II.

1. do their parents always go fishing on weekend

2. does Lan play badminton every day

3. she is doing aerobics now

4. how often do the children go to the movie

5. nam often play video games in the afternoon

6. the students sometimes have a picnic

7.do they go campin sometimes?

8. he usually goes swimming  with his friends 

9. i went sailing on the river in my house with my classmate Nam last summer

10. you should wear goggles when you go swimming to protect your eyes