A.farm B.teacher C.nurse D.doctor 哪个不是同类的一项,为什么

A.farm B.teacher C.nurse D.doctor 哪个不是同类的一项,为什么 He works as a teacher now,but he ___ on a farm for 3 years.A.worked B.has worked C.had worked D.woHe works as a teacher now,but he ___ on a farm for 3 years.A.worked B.has worked C.had worked D.wokes答案给的是A,但是为什么不能选C过去完 my father is a_A cooker B cook C farm D teacher 本题选择什么15.He works as a teacher now,but he________ on a farm for three years.15.He works as a teacher now,but he________ on a farm for three years.A.worked B.has worked C.had worked D.works 但是我觉得应该选择B 选择、11.---What's on the____?---There are some horses and cows.A.school B.farm C.home11.---What's on the____?---There are some horses and cows.A.school B.farm C.home12.---____computer is that?---It's my art teacher's.A.Who's B.Whose C.Whose's13.- He______ on the farm for twenty years and now he is a teacher.A.has worked B.had worked C.worked D.works不是有for+一段时间么,为什么不能选b呢 Are your parents work on the farm these days?A.Are B on the farm C days指出并改正 ___is my dreamA.As a teacher B.Being a teacher C.A teacher D.To a teacher She is a farmer. She works _________ a farm.A. in B. at C. on D. / ____work is very important in a discussion.A.Team B.House C.Farm D.School There's sheep on the farm?A.little B.a little C.many 选哪个? I’d like（ ）eggs on the farm.A.collect B.collects C.collecting D.collected Helen picked up many oranges on the farm last week .( ) A B C D Can you say something ( ) an American farm?A.with B.For C.At D.about there is always ()to do on the farm A/much B/little C/fast D/far 选择They use animals()farm work.A.do B.does C.doing D.to do We can use () to heat our homes.A、light B、fuel C、rain D、farm We ( ) Liu Tao’suncle’farm on sunday A,visited B,went C,planted