21. Although the airline has cut the number of cities _____ it flies to, each week several flights still make the round trip from Cuba to Jamaica.
A.where B.when C.that D.what
21.C【解析】空格后的句子（it flies to）是不完整的，因此可排除关系副词。在what 和that 之中，应当选择能够修饰先行词的关系代词that（在从句中是宾语）。
关系代词有who,whom,that,which,whose
关系副词有where(地点),when(时间),why(原因)
总体来说关系副词在定语从句中做状语
他们和关系代词主要的区别是where,when,why=介词+which
22. It is well known that employees do not contribute enough _____ the plans.
A.from B.to C.with D.at
22.B【解析】4 个选项都是介词。如果不能从后面的名词来判断答案，那么就要考虑不是和前面的动词构成固定搭配了。contribute … to … 向…提供…。记住“contribute to+名词”也能以不及物动词的形式使用。
23.The company plans to _____ and reorganize many of its stores to eliminate overlap in jobs and office functions.
A.closely B.close C.closed D.be closed
23.B【解析】plan 在这里是以to 不定式为宾语的及物动词。B 选项和D 选项为动词原形，因此可能是正确答案。接下来，句子中有明确的宾语，这是解题的关键。当剧中两个动词以and 链接时，and 后面的动词（reorganize）如果宾语，则动词是主动语态，否则就是被动语态。
24.Mr.Kelly has the same question _____ the warehouse location which we intend to use.
A.concerning B.regards C.with respect D.as of
24.A【解析】空格前面的部分是个完整的句子，因此空格内应填入使后面的名词变成修饰语的介词。有此功能的介词是A 选项和D 选项，其中A 选项在意义上更为符合。regarding；with regard to表示“关于”的意思。
25. Two months ago, we were very bearish, but_____then we have switched our strategy to the bullish side.
A.yet B.still C.already D.since
25.D【解析】这里的then 是名词，它的前面应该填入介词。选项中只有D 选项是介词，其他选项都是副词。
bearish: adj.如熊一样笨拙的；粗暴的；（股票）行情看跌的
bullish: adj.似牡牛的；看涨的；上扬的；乐观的
26. The executives have repeatedly indicated the company's interest in setting up shops provided the regulatory _____are removed.
A.provides B.hurdles C.handles D.paddles
26.B【解析】空格内应填入名词，所以排除A 选项。剩下的选项通过释义来判断，remove a hurdle 意为“移除障碍物”。
provided = providing: conj.假如；若是；除非
27.More than 300,00 Koreans have a net worth over $1 million, _____ property.
A.excluding B.exclude C.to exclude D.excluded
27.A【解析】空格前的部分是一个完整的句子，因此空格内应填入介词，与property 构成句子的状语成分excluding 在做介词时意为“除...之外”。
28.We are supposed to discuss what an increasing number of people consider to be an_____dangerous product.
A.inherently B.inherent C.inherency D.inherence
28.A【解析】空格内应填入修饰形容词（dangerous）的副词。inherently dangerous 意为“本身/本性危险的”。然而，在“冠词+副词（空格）+形容词+名词”的形式中，需要留意空格内填入的词语究竟是修饰形容词的副词，还是修饰名词的形容词。
inherent: adj.固有的；内在的
inherency: n.固有(内在性；基本属性)
inherence: n.固有性；内在性；基本属性
29.The employee who worked most of his life in this division _____ "Employee of the Year".
A.has been awarded B.awarded
C.have awarded D.is awarded
29.A【解析】所有的选项都是谓语动词。考虑到单复数的问题，排除C 选项。接下来考虑主动语态还是被动语态，award 是和give 同类的及物动词，因此后面应跟一个直接宾语和一个间接宾语。如果只有一个宾语，那么就是被动语态的用法。最后考虑时态，句子里说的是颁奖给“一直”为某事努力的人，所以应该使用现在完成时。
30.The interviewing process we use is _____ just a skills assessment, but something called behavior-based interviewing.
A.nor B.not C.as D.yet
30.B【解析】not only(=just)A but (also)B 是一个句型，意为“不仅A...而且B 也...”。
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