It was 80 years before Christopher Columbus crossed the Atlantic _____ Zheng sailed to East AfricaA.when B.that C.after D.since选哪个?为什么不选其他的?It be +时间+连词（when、before、after、since） 这个句型我一直不知道

It was 85 years还是 it has been 85 years? It was three years before he came it was about 100 years ago It is anyhow cleaner than it was 100 years ago it was eight years ag和that was eight years ago有区别吗? 求一篇英语完形填空的解答!Lei Feng left us many year ago ,but he'll aways be r_____as a great man.Lei Feng was born in a poor family in 1940,when he was s _____a child,his grandfather died,only two years later ,hit father followed and befo It was ten years since I left my hometown.改错 It's three years since he was married .的翻译 It is three years since she was in the It was about 600 years ago______the first cl.. It was three years ago ( ) he left 为什么是that? it was 7 years before they got married.翻译 这句 it is cleaner than was 100 years It was stolen twenty years ago whenIt was stolen twenty years ago when dan was a boy of fifteen. it was thirty years until they were able to reunite 能代替 it was thirty years before they were吗 Even though it was years ago.even和thougEven though it was years ago.even和though在原句中是什么意思 英译中5句:— We can give you a ride into town1— We can give you a ride into town— Oh,that would be great.Thank you.2— Haven't seen you for ages!Do you still work in Guangzhou?—No,I don't.It's two years since I worked there.3As never befo 玻璃杯 用英语怎么说?两个玻璃杯 用英语怎么说?两杯水 用英语怎么说?2.元音音素有哪些?3.（D)The book was so interesting that he had read it for three hours_____he realized it.为什么选D?A.when B.until C.after D.befo