It is 50 years ___the People's Republic of China was founded.A.afterB.beforeC.whenD.since

It is five years since he smoked It is been years的句子结构 People say that it is 100 years old.同义句------- --------that it is 100 years old. It is anyhow cleaner than it was 100 years ago Angel is twelve years old.It is her birthday today It is the worst weather since 50 years ago为什么不是It has been.不是现在完成时吗 It is years since we meet last time.（纠错） It is three years since she was in the It is five years ___ Mr Wang ___ the car this is it.five years.you are not alone forever. It is ten years since he ____(join) the army It is more than tow thowsand years old it is 3 years since Tom has been abroad It is forty years since he home 改为间单句 it is long years sine I _____ (live) here it is natural enough after long years of childhood. 这句 it is cleaner than was 100 years It is four years _____ I _____ here.