1.--Where are the Greens,may I ask?

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1.--Where are the Greens,may I ask?
--Well,they ___ to England.They have been there for nearly a week now.
A.have been B.are goint to C.have gone D.will go
2.How long ____in Chengdu?
--for just the weekend to come.I'll be back next Monday morning.
A.are you staying B.did you stay C.have you stayed
3.A moment ,please.I'm checkingif Mr.Smith____free tomorrow.
A.is B.being C.to be D.will be
4.I bet Mrs.black will come to help us with the celebration if she ____ too busy tomorrow.
A.is B.will be C .won't be D.isn't
5.---Will you go to the cinema,Mary?
---No,I'm afraid not .Because I ____ my ticket.
A.lose B.am losing C.lost D.have lost

同学,很高兴回答你的问题

正确答案如下：

C have gone to 是指去了某地,还没有回来,have been to 是指去了某地已经回来了,根据句意,现在还没有回来,所以选C
C how long 是多久,多长时间,一般用于现在完成时态中,表示做了某事已经有多长时间了
D 这句话是宾语从句,而宾语从句中的时态是将来时,所以用will be,注意这句不是if引导的条件状语从句,因为这个if 不是如果的意思,而是“是否”的意思,这句话的意思是：请稍等,我在查明天史密斯先生是否有空.
D 这句话是if 引导的条件状语从句,从句中用一般现在时,而主句中用将来时,即“主将从现”.这句话的意思是：我打赌布莱克夫人如果明天不忙的话,她会来帮我们搞庆祝活动.
D 我的票丢了,是发生在过去某一时刻,对现在有影响,所以用现在完成时.

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