答案是cac,求详解1．Perhaps it will be a long time_____from abroad.A

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答案是cac,求详解
1．Perhaps it will be a long time_____from abroad.
A.when Tom comes back
B.when Tom will come back
C.before Tom comes back
D.that Tom comes back
2.______that dress when I first saw you at the sation?
A.were you wearing B.have you worn
C.did you wear D.do you wear
3.Mr Wu______to work by bus every day.
A.has been traveling B.has traveled C.traveles D.is traveling
第一题选d不行吗？

1C
时间状语从句,主将从现.而且根据意思,用before
2A
表示那个时候正在进行的状态,be wearing,穿着.
3c
every day 是表示经常的一个动作,故用一般现在时
如果第一题选D的话,别扭,另外,意思也出现偏差啊.
会成为：Tom回国会花很长时间,这个时间是指在归国途中的时间花的很长,即旅途很长,而非来之前的日子很长,意思就变了.
按说语法也没什么不对,但是很少这么理解的,作为应试题目,你得学会揣测出题人的意图

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