55.　 Our teacher asked us _________ (not talk) in class.

54.　 I fell off my bike, but _________ (幸运), I wasn’t hurt.

53.　 How many times can you skip without ___________ (停止)？

52.　 Have you finished _________ (read) the novel yet?

51.　 Guo Jingjing and Tian Liang are famous ___________ (swim).

50.　 Yang Liwei is the first astronaut _________ (fly) into the space in the spaceship.

49.　 Look! There are many students on the playground. Some are playing basketball, and _________ (other) are playing table tennis.

48.　 It’s hot today. Let’s go __________ (swim).

47.　 A bus is _________ (慢) than a car.

46.　 There is a ______________ (五米深) swimming pool in this park.