It is about 5 years () he came to our school填since or for填哪个?

It is about 5 years () he came to our school填since or for填哪个? It is about ten years I met you lastIt is about ten years I met you last A since B for C when D as It is about ten years __________ I met you last.A.since it was about 100 years ago The boy has learned English for about three years的同义句是什么It is about three years ______ the boy _____ to learn English要怎么改 it is said about what is it about it is about doing it is said that in about 500years ,there will be( ) room only on the earth.(stand)请说明理由 It ( )about fifteen years since he ( )his hometown.答案是is:left 可是since不是应该用现在完成时么? It is about five years ___the Green family came to China.A,since B,before C,until为什么选A （ ）is it?it is about ten. what is it about men really?what is it about. It is not about you 请教大神几个英语句子.All-purpose robots are not a new idea.It's been 5 or 10 years from happening for about 50 years says Eric.打引号的这句话,我怎么翻译都翻译不明白.2,it is possible that it grew out of the discovery that what is it about it?qwertyuiop It was about 600 years ago______the first cl..