249.There is no doubt ________ the committee has made the right decision on the housing project.

54.My mother can't get __________ because she has rheumatism(风湿病).

53.There __________ nothing more for discussion, the meeting came to an end half an hour earlier.

52.Do help yourself to some fruit,__________ you?

51.The central provinces have floods in some years, and __________.

50.This is an illness that can result in total blindness __________ left untreated.

49.Acute hearing helps most animals sense the approach of thunderstorms long before people __________.

48.Much as__________, I couldn't lend him the money because I simply didn't have that much spare cash.

47.__________, he always tries his best to complete it on time.

46.He's__________as a "bellyacher"-----he's always complaining about something.

45.If you have really been studying English for so long, it's about time you__________able to write letters in English.