正确答案是D,但是为什么?He is the only one of the students who --- a winner of scholarshipfor three years. A.is B.are C.have been D.has been

Mr.Green's already back home,_____he?A.hasn't B.has C.isn't D.is正确答案是C,但是为什么啊, 我选的是c,为什么错了.（正确答案是d）The baby can't walk,He is only_______.c.8-month-old d.8 months old He thinks his aunt is right.(改为反意疑问句） He thinks his aunt is right.____ ____?我认为应该是：isn't he 是对aunt来做答,并且是否定的,但是正确答案是doesn't he,请问为什么用doesn't 而不是isn't He thinks his au He thinks his aunt is right.(改为反意疑问句） He thinks his aunt is right.____ ____?我认为应该是：isn't she 是对aunt来做答,并且是否定的,但是正确答案是doesn't he,请问为什么用doesn't 而不是isn't 刚才有人回 正确答案是D,但是为什么?He is the only one of the students who --- a winner of scholarshipfor three years. A.is B.are C.have been D.has been He's already back to Australia,(.(.).He is on a visit to Shanghai.A.isn't he;No ...He's already back to Australia,(.(.).He is on a visit to Shanghai.A.isn't he;NoB.hasn't he;YesC.isn't he;YesD.hasn'he;No正确答案是A,可是为什么要用isn't he, he doesn't play tennis very well at present because he_____a.doesn't practiceb.is out of practice正确答案是B 但A为什么不行啊? -Look at the man in the classroom!Is he Mr.White? -No,it___be him.He's eating in the dining hall.A can't 正确答案是选A但是C也是表推测啊,为什么不选C 求详解B mustn'tC may notD needn't hello , may I speak to Tom? He is in the next room right now. _____ please.A; HOLD ON B: WAIT A MOMENTC: DON'T GIVE UP D: DON'T STOP正确答案为A , 但是b不行吗? ---who broke the window?----______.A.Him B.He C.He broke D.It is him 正确答案是A,为什么?省略专练上面的题,百思不得其解 Is that your father ()I do not know the man.A.o,he is not.B.Yes,he isC.Yes,it is D.No,it is not我知道正确答案是D,可为什么不能选A? -He is not a friend of yours,is he?-_____,I have never seen him before.A、No,he isn't B、No,he is C、Yes,he is D、yes,he isn't 我想问问这是为什么, She insisted that she ____ ill of him behind him,but he didn't believe.A.hadn't spoken B.shouldn't speak C.wouldn't speak D.not speak正确答案是A 为什么不是D When asked about the possibility,he told us that there was little chance,—————?A.didn't he B.did he C.wasn't there D.was there正确答案是哪个,为什么? Is this museum____they visited last month?A that B which C where D the one我知道正确答案是哪个,但是说不清为什么, Jimmy came close to being killed in a traffic accident the other day. ____? He was driving carefully all the time. A.When B.What C.Pardon D.How 正确答案是D 但是为什么选择D而不是b He is talking to a journalist__CCTV.A.fromB.on正确答案是A但是我认为B也能说的过去啊～ Sir,you_____be sitting in this waiting-room.It is for women and children only. A.can’t B.shouldn't C.won’t D.needn't请帮忙解答一下为什么正确答案是B,而不是A呢?