三.完形填空(共15小題：每題2分，共30分。)

　　通讀下面的短文，掌握其大意。然后，從每小題的四個(gè)選擇項(xiàng)中選出最佳選項(xiàng)。

　　Everyone likes things that are free, and businesses often give things for free to customers as a way of getting more people to pay attention to their products.

　　Ariely, a scientist from MIT, did an experiment on what people would do when _21_ things that were free. He _22_ a group of students two kinds of chocolates: the good one for 15 cents each and the poor one for 1 cent each. The good chocolate was worth ﹩1.00, so 15 cents was very cheap, _23_ the poor quality chocolate was worth 5 cents, so _24_ it for 1 cent wasn’t very cheap.

　　Most people chose the high quality chocolate for 15 cents. That’s not a _25_. But then Ariely lowered the _26_ of both pieces of chocolate by 1 cent. If people were _27_ correctly, then they should _28_ choose the good quality chocolate. But that _29_ what happened. Most people chose the free chocolate. This doesn’t make sense in our _30_ way of understanding economic behavior(經(jīng)濟(jì)行為).

　　What is happening here? Ariely _31_ that people want to get a good bargain . But they also want to reduce risk(風(fēng)險(xiǎn)). That is, they want to _32_ the chance of making a _33_. If you pay 14 cents for a piece of chocolate, and then you don’t _34_ like it when you eat it, you have lost 14 cents. But when something is free and you don’t like it, you haven’t lost anything. People would _35_ not to take a risk over getting a better bargain

　　21. A. facing B. buying C. giving D. treating

　　【導(dǎo)師解析】A.根據(jù)意思來(lái)選擇。Ariely做了一個(gè)實(shí)驗(yàn)，關(guān)于當(dāng)人們面對(duì)免費(fèi)東西時(shí)會(huì)做什么的實(shí)驗(yàn)。表示面對(duì)只有A

　　22. A. posted B. produced C. offered D. told

　　【導(dǎo)師解析】C. 他給了一群學(xué)生兩種巧克力.offer表示提供，給。

　　23. A. if B. as C. for D. but

　　【導(dǎo)師解析】D 根據(jù)此句話的意思：高質(zhì)量的巧克力值﹩1.00，所以15分是非常便宜的，下一句是低質(zhì)量的值5分，所以兩句間應(yīng)該是轉(zhuǎn)折關(guān)系，用but.

　　24. A. getting B. holding C. eating D. making

　　【導(dǎo)師解析】A.這里的getting相當(dāng)于buying.根據(jù)句意，因此用一分錢買不是很便宜。

　　25. A. dream B. reason C. reply D. surprise

　　【導(dǎo)師解析】D。根據(jù)上文的分析，大多數(shù)人選擇高質(zhì)量的巧克力不是一件驚奇的事情。

　　26. A. weight B. size C. price D. quality

　　【導(dǎo)師解析】C。根據(jù)上下文，下文是降低了巧克力的價(jià)格。所以這里應(yīng)該是lower the price.

　　27. A. working B. thinking C. planning D. looking

　　【導(dǎo)師解析】B.如果人們正確的思考，他們?nèi)匀粦?yīng)該選擇高質(zhì)量的巧克力。

　　28. A. still B. once C. almost D. even

　　【導(dǎo)師解析】A。still 仍然，還。符合題意。

　　29. A. should be B. shouldn’t be C. is D. isn’t

　　【導(dǎo)師解析】D。根據(jù)下文，那不是按照正確思考所發(fā)生的。

　　30. A. easy B. old C. normal D. modem

　　【導(dǎo)師解析】C。根據(jù)此句的意思，這不是我們對(duì)經(jīng)濟(jì)行為的正常理解。

　　31. A. questioned B. explained C. agreed D. added

　　【導(dǎo)師解析】B。上文講到人們的行為不正常，所以Ariely對(duì)此進(jìn)行了解釋…….

　　而不是質(zhì)疑question, 或agree。

　　32. A. find B. leam C. lower D. take

　　【導(dǎo)師解析】C。根據(jù)下文，他們想降低犯錯(cuò)誤的風(fēng)險(xiǎn)。

　　33. A. decision B. mistake C. promise D. waming

　　【導(dǎo)師解析】B。make a mistake 是固定短語(yǔ)。

　　34. A. usually B. gradually C. certainly D. actually

　　【導(dǎo)師解析】D。根據(jù)句意，當(dāng)你吃巧克力的時(shí)候，你實(shí)際上并不喜歡它，你就失去了14分。

　　35. A. start B. prefer C. manage D. afford

　　【導(dǎo)師解析】B。根據(jù)句意，人們更愿意不冒風(fēng)險(xiǎn)而得到更好廉價(jià)物。