Olympic Games are held every four years at a different site, in which athletes【A1】_____ different nations compete against each other in a【A2】_____ of sports. There are two types of Olympics, the Summer Olympics and the Winter Olympics.
In order to【A3】_____ the Olympics, a city must submit a proposal to the international Olympic committee (IOC). After all proposals have been【A4】_____, the IOC votes. If one city is successful in gaining a majority in the first vote, the city with the fewest votes is eliminated, and voting continues with 【A5】_____ rounds, until a majority winner is determined. Typically the Games are awarded several years in advance, 【A6】_____ the winning city time to prepare for the Games. In selecting the【A7】_____ of the Olympic Games, the IOC considers a number of factors, chief among them which city has, or promises to build, the best facilities, and which organizing committee seems most likely to【A8】_____ the Games effectively.
The IOC also【A9】_____ which parts of the world have not yet hosted the Games. 【A10】_____, Tokyo, Japan, the host of the 1964 Summer Games, and Mexico city, Mexico, the host of the 1968 Summer Games, were chosen【A11】_____ to popularize the Olympic movement In Asia and in Latin America.
【A12】_____ the growing importance of television worldwide, the IOC in recent years has also taken into【A13】_____ the host city’s time zone.【A14】_____ the Games take place in the United States or Canada, for example, American television networks are willing to pay【A15】_____ higher amounts for television rights because they can broadcast popular events 【A16】_____ in prime viewing hours.【A17】_____ the Games have been awarded, it is the responsibility of the local organizing committee to finance them. This is often done with a portion of the Olympic television【A18】_____ and with corporate sponsorships, ticket sales, and other smaller revenue sources. In many 【A19】_____ there is also direct government support.
Although many cities have achieved a financial profit by hosting the Games, the Olympics can be financially【A20】_____. When the revenues from the Games were less than expected the city was left with large debts.
【答案解析】a variety of表示“各种各样的”， 后面只能跟可数名词， 形容种类的繁多。 a number of若干， 很多， 只能跟可数名词。 a lot of许多， 大量， 既可跟可数名词又可跟不可数名词。 a series of一系列的； 一连串的。 题意是说“奥林匹克运动会上运动员们在各种不同的运动项目上相互竞争”， 因此C为正确答案。
【答案解析】A、 C、 D都有“允许”之意， let sb. do sth.即其后跟不带to的动词不定式。 而permit sb. to do sth.尤指（ 根据正式决定、 规章或法律） 允许， 准许， 许可， 常用于书面通知和声明。allow sb. /sth. to do sth.（ 家长、 老师、 有权力的人等） 允许， 准许。 根据题意， 应选D。