he has just bought a new house.he has been in it( ) a short time.a.since b.for c.about d.ago选哪个,为什么?

He has just bought a new house in the city.（改为被动） 一般过去式和现在完成式he has a garage in silbury and now he has just bought another garage in pinhurst 可以改成he has a garage in silbury and now he just bought another garage in pinhurst吗? He has just bought another garage .有语法错误吗 He has just bought twelve pigeons.When did he——them?a.bought b.buys c.buy d.buying选什么,为什么? he has just bought another garage 中的has just 什么词? he has just bought twelve pigeons 改成 he just ____(buy) twelve pigeons 怎么改 he has just bought a new house.he has been in it( ) a short time.a.since b.for c.about d.ago选哪个,为什么? Tom has bought a new car just now.改错. he has just bought twelve pigeons的just带有什么样的意思,起什么样的作用 silbury是什么意思?我在词典找不到.例句：Mr.James Scott has a garage in and now he has just bought Silbury anther garage Pinhurst. He has just bought an Australian car.可以说Chinese car吗 He has just bought an Australian car and has gone to Alice Springs.为什么这里用an不用a?He has just bought an Australian car and has gone to Alice Springs.请问an不都是用在元音之前吗,这里的Australian car 都不是原因啊,为什 副词放在什么位置,看下面几个句子The car is badly damaged.可以说成是：The car dadly is damaged.He is still smiling.可以说成是：he still is smiling.He has just bought a car.可以说成是：He just has bought a 新概念里 Jack bought a new mobil phone the other day.（）?That's his third one in just one month.A.Had he B.Did he C.Does he D.Has he 选A为什么不行? 现在完成时与过去时Mr.James Scott has a garage in Silbury and now he has just bought another garage in Pinhurst. Pinhurst is only five miles from Silbury, but Mr. Scott cannot get a telephone for his new garage, so he has just bought twelve p ben is upset because the watch which he has just bought _____ 用is gone 还是has gone啊? Jack bought a new mobile phone the other day.( that's his third one in just one monthA.had he B.did he C.does he D.has he He ________ the computer for half a year. A.has bought B.had bought C.has had D.had had