47.　 _______ all the sports, I like swimming best.

　 A. At　　　 B. In　　 C. Of　　 D. For

46.　 He climbed the tree _____ a cat.

A. after　　　 B. as　　 C. over　　　 D. like

45.　 Water can turn _____ ice when the temperature is below zero.

A. in　　　 B. into　　 C. by　　 D. until

44.　 She looks like Chinese, but ____ fact she is Japanese.

A. in　　　　 B. at　　　 C. on　　 D. for

43.　 Xiaoming won the first prize in a maths contest, soon the news was known _____ the school.

A. in　　　　 B. past　　　 C. over　　　 D. throughout

42.　 Maths is very important _____ many ways.

　　 A. at　　　　 B. in　　　 C. for　　　 D. on

41.　 My mother is not at home. She will be back _____ 2 hours.

A. before　　　 B. for　　　 C. in　　　 D. after

40.　 Yesterday we kept working _______ the night, so we are very tired now.

A. during　　　　 B. for　　　 C. over　　　 D. throughout

39.　 Have you got any tickets _______ next Sunday’s show?

A. for　　　 B. on　　　　 C. in　　　 D. of

38.　 I was sick, so I have to ask _____ leave.

A. of　　　　 B. in　　 C. for　　　 D. to