Chia động từ trong ngoặc

16. Many books __________________________ (write) about the Second World War.

17. The name of the new town _________________________ (choose) by the committee tomorrow.

18. Present day problems demand that we _______________________(be).ready for any emergency.

19. You __________________________ (not go) there because he did not expect you.

20.You __________________________  (walk) too fast. That’s why you are tired