57. Have you read 　　▲　 　(today) newspaper?　

56. A computer is 　　▲　 　(expensive) than a TV set.　

55. -How many 　　▲　 　(tooth) does a dog have?

　 -Sorry, I have no idea. Let’s search on the Internet.

54. We should speak to the old man 　　▲　 　(polite).　　

53. Playing too many computer games is 　　▲　 　(harm) to you.　

52. Tom is a 　　▲　 　(a good sense of humour) boy, so everyone likes him.

B) 根据句意，用括号中所给单词的适当形式或句子的语法要求填空。

51. The tourists had no c　 ▲　 　but to wait for the next bus.

50. I can’t 　　▲　 　(买得起) to go to the 2010 World Cup.

49. Are you 　　▲　 　(有空的) this evening?

48. We had a very cold 　　▲　 　(冬季) last year.