24.He _______ (go) to bed until his father came back yesterday evening.

23.We all spend as much time as we can ____________ (read) English every day.

22.How enjoyable it is to play football on the playground __________ (cover) with grass!

21.He is such an ________ and lazy person that he doesn’t like to take part in after-school ____________. (active)

20.No one knew what ___________ (happen) to the earth in a hundred years.

19.The little boy ran after the robber, __________ “stop him!” (call)

18.He seems _________ (worry) about ___________ (fail) in the English exam.

17. Sandy is attractive and graceful in____________ (appear).

16. It is　 __________ (think) of you to bring me an umbrella.

15. Casper was born on 22nd- August. He is a strong and ____________(confidence) person.