they have been in nanjing since ______.A.three weeks B.three

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they have been in nanjing since ______.A.three weeks B.three days before C.four months ago
D.next week
several days has passed _____ the air carsh happened.
A.since B.after C.as D.before ·

They have been in Nanjing since four months ago.
这种句子中since 一般加时间名词加ago
Several days has passed since the air carsh happened.
自从坠机那天起已经过了好几天了.
since 从.时候起

they have been in nanjing since ______.A.three weeks B.three The twins___Canada for three weeks.A.has been to B.have been They have been in this city ＿ three years ago.(A.for B.about The twins ____ Canada for three weeks. A.has been to B.have Anna has been ill in hospital for three weeks.（用since改写句子） It’s three weeks since we （） him.A.see B.saw C.have had D.h It's about three years since they＿here.是填came还是have been? I will have______holiday A.three weeks B.three-weeks C.three They have been working for__whole three hours. I （） there in three years. A. went B. have been C. haven't I have been teaching in this school since three years ago.变同 ------____ have you been painting?------Since three years ag