用for,since,before或者ago填空.1we have lived here（ ）ten years 2i never made cakes（ ） 3they have studied English （ ）three years（ ）4two weeks has passed （ ) she went to hangzhou

用for 或者since 用before,ever,never,already,yet,since,for填空 It all happened a long time ____.A,before B,ago C,for D,since Tom has lived in Shanghai____three years ago.A for B.since C.before D./ Bruce has lived here ( )last year.A./ B.for C.before D.since It has been snowing ____several days.A .since B.for C.in D.before it's six weeks__I met you last.a when b.since c.before d.for My father has been a computer engineer____1995a.in b.before c.for d.since it's six weeks__I met you last.a when b.since c.before d.for 21.my sister has been studying for a test____a week.A.in B.since C.before D.for 用for,since,before或者ago填空.1we have lived here（ ）ten years 2i never made cakes（ ） 3they have studied English （ ）three years（ ）4two weeks has passed （ ) she went to hangzhou 1i have had a tremperature[ ]i had a headache.2mr.black has lived in china[ ]five years ago.为什么1.a.since b.for c.before d.after2.a,before b.for c./ d.since it's + a period of time + before/since 的区别?it's + a period of time + before... 与 “it's + a period of time since...”的区别是什么?什么时候用 since 什么时候用 before 谈since,for,ever,already,yet,just,before的用法? for yet ago before since分别用于什么时态 The work has lived here for twenty years_____ A,since twenty years ago B.since he came hereC.twenty years ago D.twenty years before 为啥啊 the worker has liwed here for twenty years____ A.since twenty years agoB.since he come hereC.twenty years ago D.twenty years before 原因啊 . The hospital has been open ____ A.for ten years before B.since ten years agoC since ten years D ten years ago