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SECTION 3 Error Correction
This section consists of 15 sentences; in each sentence there is a part given in the brackets that indicates a grammatical error. Below each sentence, there are 4 choices respectively marked by letters A,B,C and D.Choose the word or phrase that can replace the part so that the error is correcteD.There is only ONE right answer.
We learned that Columbus has discovered America in 1492.
A.had discovered
B.discovers
C.discovered
D.was discovering

A.We
B.
A.had
C.discovers
C.discovered
D.was

【参考答案】

C
解析：时态应用本句是个主从复合句；主句用的是一般过去时，除一些特殊情况(如：客观真理总用一般现在时)外，主从......

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以下对供应链管理的说法中，正确的是：

A.供应链管理就是根据价值链末端正在发生什么来提示价值链的首端该做什么以及何时做
B.供应链管理就是根据价值链首端正在发生什么来提示价值链的末端该做什么以及何时做
C.供应链管理包括对供应链各环节内部和各环节之间的信息流、产品流和资金流的管理，以实现顾客利益最大化
D.供应链管理包括对供应链各环节内部和各环节之间的信息流、产品流和资金流的管理，以实现供应商利润最大化

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While some international couriers are showing signs of exhaustion, EMS (Express Mail Service), the generic name for the courier services of post offices, seems to be finding its stridE.Known as Datapost in Britain, as Chronopost in France, and as A1-Barid al-Mumtaz in Saudi Arabia, EMS is now second in the international courier business (jointly with TNT Skypack). Last year it delivered 5.6 million items, weighing less than 20 kilograms each, across borders. That and its annual growth rate of around 5 percent have worried DHL, the market leader, enough for it to counter-attack in the Courts.On October 26, a Dutch judge ruled against DHL on all three counts filed against the Dutch post office: that the three-initial name was too close to DHL's; that the orange lines in the EMS logo were too similar to DHL's dark red ones; and that the claim to the widest route system in the world was unfoundeD.DHL has threatened the Swiss post office with similar action, but it may reconsider after the Dutch ruling.EMS has some advantages over the private couriers. One is a dense ready-made network of offices, especially in Europe, the avowed target area of the private couriers. Another advantage is a long tradition of working with customs authorities. In a business where minutes count, it pays to have good friends at customs. That advantage particularly irritates the private couriers because there is no legal way to combat such unquantifiable coziness.The private courier services are also annoyed because in countries like Switzerland and Italy, where the post office is officially a monopoly, they pay it a feE.In Switzerland DHL says it pays more than SFr lm ($ 708,000) 'to the competition' each year. In France the couriers have won a battle for exoneration.Although governments are under little pressure to keep prices artificially low, EMS is often cheaper than the private couriers, but not always. A recent test in Britain (on a domestic route) showed Datapost about halfway between the least and the most expensive, but gave it full marks for speed and servicE.Each national EMS is free to set its rates and follow its own rules on things like bulk discounts. The Universal Postal Union, based in Berne, determines how costs and revenues are split between sending and receiving countries, and standardizes procedures. More than 100 postal administrations have linked into the system—and more are coming, including Russia's. That makes the feisty EMS particularly happy since its rivals have not been allowed to serve anywhere in RussiA.The passage focuses primarily on ______.A.problems of post offices in BritainB.the new courier service—EMSC.the competition between private and international courier servicesD.differences between EMS and DHL

A.6
B.
C.
D.
E.
F.
G.
The
H.
A.problems
I.the
J.the
K.differences

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