单选题
Video games have become increasingly realistic, especially those involving armed combat. America's armed forces have even used video games (1) recruitment and (2) tools. But the desire to play games is not the (3) why the United States Air Force recently (4) a procurement request for 2,200 Sony PlayStation 3 (PS3) video-game consoles. It intends to link them (5) to build a supercomputer that will (6) Linux, a free, open-source operating system. It will be used for research, including the development of high-definition imaging systems for radar, and will cost around one-tenth as much as a conventional supercomputer. The air force has already built a smaller computer (7) a cluster of 336 PS3s. This is merely the latest example of a(n) (8) trend. There is a long tradition of technology developed for military use filtering (9) to consumer markets: satellite-navigation systems (10) to guide missiles can also help hikers find their way, and head-up displays have (11) from jet fighters to family cars. But technology is increasingly moving in the other (12) , too, as consumer products are (13) for military use. Traditionally the military has preferred to develop and control its own technology, not just for tactical advantage but also to (14) that equipment was tough and (15) enough for those whose lives would depend on it. That began to change after the cold war as defence budgets became (16) and the development of (17) industrial and consumer products accelerated. As some of these technologies have become commoditized products which are (18) to everyone—friend and foe alike—there seems less (19) not to buy them and use the savings for more critical equipment that needs to be built-to-order. And consumer products can often be tweaked to make them more rugged or (20) when necessary.
单选题
A. to B. of C. as D. from
【正确答案】
C
【答案解析】[解析] 本题考的是介词搭配以及前后文的内容照应。从文中第一句可以看出本段强调的是Video games在现实生活中的应用，后面这一句应该是紧跟着前面一句的观点进行举例论证，旨在突出视频游戏的功能和用途。所以本句应该是说美军已经将视频游戏用做招募和 (2) 的工具，所以选C，use A as B意为“将A当做B用”。A项use sth. to do利用某物做某事。to后面接动词原形，不能接名词；B项use of sth. 利用某物，被利用的对象应该置于介词of之后，不能放在use和of之间。D项from来自，一般不与use连用。
单选题
A. training B. manufacturing C. stimulating D. alerting
【答案解析】[解析] 在这个why引导的从句里面，the United States Air Force是主语，a procurement request是宾语，for引出的是对象，表明是对2200台PS3的购买需求。从后面一句看，意思是说美军想利用这些PS3建造超级计算机，因此，他们一定是有这样的需求，在选项中可以与request搭配表示发出需求的动词应该是B。issue a request提出需求。
单选题
A. with B. in C. up D. between
【正确答案】
C
【答案解析】[解析] 本题考查的是介词搭配，从句子结构上看，后面的to引导不定式作目的状语，选项C与link搭配用在这里最合适，意为“将……连接起来”。句意为：它(美军)打算将它们(2200台PS3)连接起来以组建一台超级计算机。link A with B意为“将A与B联系起来”。