Read the article below about monopoly. Choose the best word to fill each gap from A, B, C or D on the opposite page. For each q

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问题 Read the article below about monopoly.
Choose the best word to fill each gap from A, B, C or D on the opposite page.
For each question 21-30, mark ONE letter A, B, C or D on your Answer Sheet.
There is an example at the beginning (0).

    Monopoly is one 0 the peculiar 21 which can affect the sale and purchase of certain commodities. In some markets, there may be only one seller or a 22 of sellers working very closely together to control prices. The result of such monopolistic activity is to fix prices at a level 23 to the seller, a level which may bring him artificially high profits. Many governments dislike this procedure and have taken legal actions to 24 or halt such business activities. In the U. S. anti-trust laws operate to limit cartels and mergers, 25 in Britain the Monopolies Commission examines all special arrangements and mergers referred to them by the Board of Trade.
    This type of monopoly is not the only 26 however. There are three other forms: state, legal and natural. State monopolies are quite common nowadays, where the 27 in a particular country control industries like steel and transport or important and prestigious revises like national airlines. Legal monopolies are rather different, because the law permits certain individuals to 28 solely from their special inventions, discoveries or processes. No other person may infringe their rights in respect to 29 monopolies.
    Finally, natural monopoly 30 where a nation or individual possesses most of a particular mineral for reasons of geography and geology.
0. A. of B. in C.off D. up

选项 A、government
B、agency
C、authorities
D、departments

答案C

解析 结合前后文,此句是说一些特别的国家利用权利对某些行业进行管制,形成政府垄断形式。C符合文意。authorities指的是权力机构,一个被授予权力的机构,特别是政府或政府官员;government指的是政府,(英)内阁,政体等。
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