I don‟t become a serious climber until the fifth grade

I don't quite like______,It's too hard.A:the fifth lesson B: 1.I don't know the c___ of the matter.2.If I become a lawyer 1.I don't really work here,I _____ until the new secretary a 语法题,I suppose you are not serious,________?A.do I B.don't I I don't want to alarm you ,but I do think there is a serious I said it ( )as a joke.Don't take it serious.A particularly Exercise: wasting has become a serious problem in the presen Is the H1N1flu very serious now?No,I don't think so.( ),we s -I don't need the book tonight.-_______,I'll keep it until t Don't worry!Belive yourseif.I hope you can get a good grade don't play a ______ on the serious man,he will be angry with 英语,1、Don't p____ the soup over your clothes.2、A serious acci