请说明理由!

题目

请说明理由!
1.You know,I ________ (look) for a job for three months,and this is my first formal interview.
2.My sister ________ (stay) in Beijing for three months last year.
3.The little boy is dirty all over because he ________ (play) in the mud all the morning.
4.I ________ (wonder) if you were free this afternoon.
5.Here he is!We ________ (wait) anxiously for him since last night.
1.— I’m sure Andrew will win the first prize in the final.
— I think so.He ________ for it for months.(2008江苏)
A.is preparing B.was preparing
C.had been preparing D.has been preparing
2.—I have got a headache.
—No wonder.You_________ in front of that computer too long.(2007江西)
A.work B.are working C.have been working D.worked
3.The unemployment rate in this district_______ from 6% to 5% in the past two years.(2007上海)
—I am tired.I _______ the living room all day.
A.has fallen B.had fallen C.is falling D.was falling

答案

1.have been looking 现在完成进行式 面试正在进行中
2.stayed 过去式 去年待在北京
3.palyed 过去式 事情已发生
4.was wondering 过去进行时 事情已发生 当时的事情
5.have been waitting 现在完成进行时 事情在发生中
1.D 比赛进行中 现在完成进行时
2.C have got=have 现在时 所以选现在完成进行时
3.A in the past two years 延续到现在,所以用现在完成时态