59.　　 Only by practice will you be able to improve your spoken English.

58.　　 To tell the truth, I didn’t know that they had already gone to Shanghai until yesterday.

57.　　 Those who pretend to know what they do not know will be punished one day.

56.　　 It is very kind of him to give me so much help.

55.　　 The teachers don’t think it is difficult to learn English grammar.

54.　　 Adults are sometimes too busy to play.

53.　　 It is not easy to be a host nation for the Olympics.

52.　　 There was so much noise that the speaker couldn’t make himself heard.

51.　　 I can’t have you running up and down all day long.

50.　　 Ellen was absent this morning because she had her tooth filled.