Chia dạng đúng của động từ trong ngoặc

14. After the thief (leave) ___________the house, the police (come)________________

15. He (not go) ______________out last night, he (stay)____________ at home.

16. Lan (learn) __________English for 2 years? - No, he (learn)_____________ for 3 years.

17.You (wear)___________ uniform yesterday? - No. I (not wear) ___________yesterday.

18. _________Your mother (read)_______ book every night? - No, she (watch)_________ TV.

19. We (save)___________ electricity if we didn’t pay much money.

20. If we use water carefully, more people (have)___________fresh water.