A．单句填空
1．Or perhaps you are the only one ________ is interested in listening to the ballgame.
答案 who/that [分析句子结构知，空处引导定语从句，修饰先行词one, 指人且在从句中作主语，故填who/that。]
2．English is a language shared by several diverse cultures, each of ________ uses it differently.
答案 which [句意：英语是一种被好几种不同的文化都使用的语言，而且每一种文化使用它的方式也不同。设空处前后两部分之间既没有并列连词也没有从属连词，故后面部分应为定语从句，又因为先行词是cultures，且关系词在定语从句中作介词of的宾语，所以填which。]
3．A company ________ profits from home markets are declining may seek opportunities abroad.
答案 whose [句意：从国内市场得到的利润正在下降的公司可以去国外寻找机会。本题考查定语从句。先行词为company，将先行词代入定语从句后为：The company's profits from home markets are declining.由此可见关系词在定语从句中作定语，故填whose。]
4．We'll reach the sales targets in a month ________ we set at the beginning of the year.
答案 which/that [句意：一个月以后我们将会达到年初所定的销售目标。在本句中，先行词是the sales targets，关系代词在定语从句中作set的宾语，所以填关系代词which/that。]
5．The Greens stayed in Beijing for a week, during ________ they visited places of interest here guided by me.
答案 which [先行词为a week，表示时间，关系词在从句中作时间状语，故用during which引导定语从句。during which相当于when。]
6．Ellen was a painter of birds and nature, ________， for some reason, had withdrawn from all human society.
答案 who [先行词是a painter，从句中缺少主语，故用who在此引导定语从句。]
7．Take a couple breaths and think of something ________ gives you pleasure: a beautiful scene in nature, or someone you love.
答案 that [句意：深呼吸几次，然后想一想给你带来快乐的东西。该定语从句中缺主语，先行词为不定代词something。故填that。]
8．Florence in Italy, ________ beauty is beyond description, is the city that I have been dreaming of visiting.
答案 whose [句意：意大利的佛罗伦萨市的美丽是用言语难以描述的，它是我一直梦想去旅游的城市。本空需要关系代词引导定语从句并在从句中作定语，因此填whose。]
9．Nelson Mandela's death may, in the short term, unite South Africa in ways ________ have never been seen before.
答案 that/which [从语境看，本空需要关系代词引导定语从句修饰ways，并在从句中作主语，表示“以前从来没有人见过的方式”，因此这里用that/which引导定语从句。]
B．单句改错
1．It is a truly delightful place, as looks the same as it must have done 100 years ago with its winding streets and pretty cottages.
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答案 第一个as→which [先行词是place，非限制性定语从句中缺主语，as往往有“正如，就像”的意思，不符合句意。]
2．The number of smokers, which is reported, has dropped by 17 percent in just one year.
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答案 which→as [根据分析，此处指代的是整个句子，表示“如同，正如”，故用as。]
3．The books on the desk, which covers are shiny, are prizes for us.
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答案 which→whose [先行词为the books，与covers是所属关系，故用whose。]
4．Please send us all the information which you have about the candidate for the position.
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答案 which→that [先行词the information前有all修饰，故用that。]
5．Until now, we have raised 50,000 pounds for the poor children, that is quite unexpected.
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答案 that→which [此处指代前面整个句子，且为非限制性定语从句，故用which。]
6．The whole city, 75% of its factories and buildings were gone, lay in ruins.
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答案 its→whose [此处为定语从句，先行词city与factories and buildings为所属关系，故用whose。]
7．There are two lakes, that cover nearly one thousand square kilometers.
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答案 that→which [先行词two lakes在定语从句中作主语，且为非限制性定语从句，故用which。]
8．John once talked to his mom about the people and cities which he had visited abroad.
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答案 which→that [先行词为people and cities，既有人又有物，故用that。]
9.Those which were trapped under the ruins finally got rescued.
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答案 which→who [先行词those指代人，且作主语，故用who。]
10．It was often the case, Miss Wang was the first to arrive at the school in the morning.
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答案 It→As [分析句子结构可知，此处为定语从句，as was often the case，表示“这是常有的事”，故用as。]