Now most families have only one child _____ our country’s one-child policy. A. 

Now most families have only one child _____ our country’s one-child policy. A. 

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Now most families have only one child _____ our country’s one-child policy.
A.  since        B. because           C. because of
答案
C
解析

试题分析:since由于,自从……以来;because因为;because of因为。句意:因为我国的一孩政策,现在许多家庭只有一个孩子。Because和because of都表示原因,区别是前者接从句,后者接名词性短语。下文our country’s one-child policy为名词性短语,故选C.
举一反三
His father has worked in this factory _____ he came here in 1980.
A. since        B.  for        C.  when
题型:不详难度:| 查看答案
A tourist will easily lose his way in Shanghai_____ he has a map or a guide.
A.ifB.sinceC.whileD.unless

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--- I feel nervous about the coming summer.
---- Me , too. Hot weather _____ makes people feel hot, ______ causes serious health problems.
A.either…. orB.neither …norC.both….andD.not only….but also

题型:不详难度:| 查看答案
Some people waste a lot of food___________ others don’t have enough to eat.
A.howeverB.whenC.asD.while

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-_______are you going for vacation?
-I am going to Canada.
A.WhatB.WhereC.HowD.How long

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