分类：教育/科学-外语学习
问题：英语选择题1____therearesalesinstores, 
1 ____there are  in stores,you can buy certain goods at lower prices.  A  When      B  As        C  Because      D  But选项B错在哪?答案是A！呵呵 2 In many countries old age is a happy time,but in the United States it is quite____for old people.  A  different    B  difficul1 ____there are  in stores,you can buy certain goods at lower prices.  A  When      B  As        C  Because      D  But选项B错在哪?答案是A！呵呵 2 In many countries old age is a happy time,but in the United States it is quite____for old people.  A  different    B  difficult    C  same    D  easy感觉A，B都可以呀，答案为A3 a Noble Diploma and a check for the prize money,which varies according to the income of the fund.which在这句话中引导的是非限定性定语从句？  4  leave stoves in the middle of rooms____they can easily be knocked over.(这是完型填空里的一句话）A  which    B  that     C  there    D where答案为D，那选项A是从语法上就不对？还是语意上不好所以才不选呢？  5  Women serve in the Japanese Diet,which makes Japan's laws.which在这里引导的也是非限定性定语从句吧？ 6_____can only drink and use the other 3 percent the fresh water that comes from rivers,lakes,underground,and other sources.A The man      B  A man     C Man      D People若在people前加个the呢？对么？是不是就变成“民族”的意思了？  7 Man can only drink and use the other 3 percent the fresh water that comes from rivers,lakes,underground,and other sources.And we can't even use all of it because some of it is in the form of icebergs and glaciers.Even worse,some of it has been polluted.这句话中在指代 rivers,lakes,underground,and other sources这些时后面用代词it,后半句中在指代icebergs and glaciers时，也用代词it，可这些名词查字典了，iceberg和glacier都是可数名词呀，为什么用it指代，而不用 them呢？？  感谢大侠回答~~~
回答：1.when和as都有“当···的时候”这个意思，但是此题选when更恰当
while为主句动作的发生划定一个时间的范围
as为主句动作的发生提供一个伴随的动作
2.B明显不合适，从句意看，在许多国家老年是一个快乐美好的时期，但是在美国却恰恰相反。这样解释最正确，你不能说不快乐就是困难，困难可能只是不快乐的其中的一种，所以用相反最合适。
3.这好像不是个句子吧，缺少很多成分。
4.选A语法不对；把炉子放到屋子中央，在那儿他们会很容易被绊倒。从句不缺成分所以用where引导。
5.是个非限制性定语从句。
6.加the也不对，这里应该是用人类的意思，the people是人民的意思。
 指代的是water，这样就明白了吧！