The Whites _(has/have)been in china for three years?应该选哪个答案,为什么?

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• The Whites _(has/have)been in china for three years?应该选哪个答案,为什么?
• 主要是要解释为什么选这个答案1.Were all the three people in the car injured in the accident?No,___only the two passengers who got hurtA.there is B.it was C.it were D.there was2.The house nddes ________,but they plan to wait until next spring to do it.A.paint B.to paint C.painting D.be painted3.By the time we got to the cinema,the film____for half an hour.A.has begun B.had begun C.has been on D.had been on4.If it ___rain tomorrow,we'll have the party outsideA.wouldn'
• 英语science and technology 作主语China sent up ShenzhouVII manned spaceship into space successfully,which shows science and technology _____ rapidly in China.A.have been developing B.develops C.is developing D.has developed我不明白为什么是选这个时态,而不选c,不是可以表示正在发展变化的过程吗?还有一个问题就是science and technology 做主语是应不应该看成是一个整体表示科技呢,谓语用单数还是复数
• Henry works in a big medicine factory now ,but he _in a hosipital for three years.A.workedB.has worked c.had been working D.had worked但是句子中有FOR 所以 为什么不选其他的答案呢？
• 有关主谓一致的请大家说下为什么选以下答案?1、Some person _____ calling for you at the gate.这里为什么用is,而不是are?2、Over 80 percent of the population of China ____ peasants.这里为什么用are,而不是is?3、The pair of shoes ____ worn out.这里为什么用was,而不是have been?population既然是单数，为什么不用is啊，和number应该是一样的啊
• 主谓一致 1,None of them is against the plan,_____?A：is he B：isn't he C:are they D：aren't they 2,The students in our class each_____an English dictionary.A:are having B:had C:did D:has been3,Little______done to prevent the air from being polluted.Much ______done to fight against pollution.A:has been;have been B:have;hasC:has been;has been D:have been;have been这三道题不懂的,都是选哪个呢?以及为什么选它?第二题的答案为D：给出的选项弄错了，正确为：A:are having B:had C:has D:have
• One of the English teachers____(has\have)been abroad.请帮我选下哪个答案,然后解释一下为什么并翻译下这句话好吗?
• — Are you still a teacher?— No,I____ in Harbin No.3 High School for five years.A.worked B.have worked C.have been working D.had worked这道题的正确答案是A,但是为什么不选B?for加时间段不是应该与完成时连用么?为什么会用一般过去式?
• 问几道初中英语题,麻烦详细解释下,先谢谢了……1.He is running ______now.A.more slowly and more slowlyB.slowier and slowierC.more and more slowly答案给的是C.可是为什么不选B呢?我记得有“比较级+比较级”这个句型啊?2.The sick man was too thin to go any ______.A.farB.fartherC.further答案给的是B,可是B、C都是far的比较级,都可以表示“更远”.为什么不选C呢?3.Miss Smith with her parents ______ China 2 years ago.A.have been inB.has gone toC.has been in答案给的是A,可是既然有with,谓语动词就应该遵循with前面的Miss Smith,应该用单数啊,为什么不选C呢?
• 实用将来完成时还是一般将来时啊?he's been studying here for three years and by next July he _____A will have graduated B will be graduated C will be graduating D will graduate 答案是选的D,但是by加将来时间不是用将来完成时吗?为什么不选b呢?哪里有被动了？
• He has been away from China( )three years agoA.after B.in C.for为什么呢?
• ________for Shanghai?Yes.And I'll come back in three months.可以用Did you leave