Jeff has been in china for a year,so his parents have not seen him ___ last April.A from B forC since D by请问这道英语单选选哪个呢?请告知为什么选那项,别的为什么不选?最后还请翻译一下这句话..

Mr.Smith saw the empty seat next to me and asked____.A.where has Jeff gone B.where did Jeff goC.where Jeff has been D.where Jeff had goneHelp me! It has been in my 英语Has been to 和Has been in 怎么用? has been to和has been in 的区别 has been in 和 has been to 的区别 has been in和has been at的区别has been in.has been at.has been to.has gone to它们的区别 句子中的has been ,have been,had been 代表什么?完成时,和过去完成时吗?可以翻译成什么?“jeff is a boy,for the past three years,has been a good fried of mine. Tom___ China for 3 years.A.has been B.has been in C.has been to D.has been at Jeff has lived in sydney and New York,but he doesn't like neither city very much.有一处错 Jeff has lived in Sydney and New York,but he doesn't like neither city very much.改错句 have/has been in 求具体用法 Everything has been left in a he has been in english since last Perhaps she has been in place then? Father,your daughter has been successful in the answer has been always in our has been in 的意思,具体,例子, that policeman has been poking in again