A . which companies will ( 1 ) _____

　　B . who have the option of ( 2) ______ trucks

　　C . who loses in the ( 3)______

　　Railroads justify rate discrimination against captive shippers on the grounds that in the long run it reduces everyone ' s cost . If railroads charged all customers the same average rate , they argue , shippers ( 4 ) _____ or other forms of transportation would do so , leaving remaining customers to shoulder the cost of keeping up the line . It ' s theory to which many economists subscribe , but in practice it often leaves railroads in the position of determining ( 5 ) _____ and which will fail . " Do we really want railroads to be the arbiters of who wins and ( 6 )_____? " asks Martin Bercovici , a Washington lawyer who frequently represents shipper .

　　答案解析：

　　1.【答案】flourish

　　【解析】 will 后跟動(dòng)詞原形，所以選flourish 。

　　2.【答案】switching to

　　【解析】介詞of 后跟名詞或動(dòng)名詞，空格后出現(xiàn)了名詞trucks ，空格所填伺語(yǔ)后必須能跟名詞，所以選switching to 。

　　3.【答案】 marketplace

　　【解析】who loses 后跟某地點(diǎn)，in the marketplace “在市場(chǎng)上”符合。

　　4.【答案】B

　　【 解析】 空格前說(shuō)如果鐵路對(duì)所有客戶都平均收費(fèi)，后文提到卡車或其他運(yùn)輸方式，運(yùn)輸方式之間有轉(zhuǎn)換，B 項(xiàng)中的switching to 與之對(duì)應(yīng)。

　　5.【答案】】 A

　　【 解析】 空格后出現(xiàn)的and 表示并列，空格所選項(xiàng)與“which will fail ”結(jié)構(gòu)上并列，所以選A 。

　　6.【答案】B

　　【解析】空格前出現(xiàn)了and ，空格后所選項(xiàng)與空格前的“who wins ”并列，所以選B 。