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To appreciate the precision of the bats echo location, we must first consider the degree of their reliance upon it. Thanks to sonar, an insect-eating bat can get along perfectly well without eyesight. This was brilliantly demonstrated by the Italian naturalist Lazzaro Spallanzani. He caught some bats in a bell tower, blinded them. and released them outdoors. Four of these blind bats were recaptured after they had found their ways back to the bell tower, and on examining their stomachs contents, Spallanxani found that they had been able to capture and eat flying insects. We know from experiments that bats easily find insects in the dark of night, even when the insects make no sound that can be heard by human ears. A bat will catch hundreds of softbodied silent flying insects in a single hour. It will even detect and chase pebbles tossed into the air. Questions 31 to 35 are based on the following passage: 31. When a consumer finds that his purchase has a fault in it, the first thing he should do is to ________ A) complain personally to the manager B) threaten to take the matter to court C) write a firm letter of complaint to the store of purchase D) show some written proof of the purchase to the store 32. If a consumer wants a quick settlement of his problem, its better to complain to ________. A) a shop assistant B) the manufacturer C) the store manager D) a public organization 33. The most effective complaint can be made by _________. A) showing the faulty item to the manufacturer B) explaining exactly what is wrong with the item C) saying firmly that the item is of poor quality D) asking politely to change the item 34. The phrase live up to in the context means ________. A) meet the standard of B) realize the purpose of C) fulfill the demands of D) keep the promise of 35. The passage tells us _________. A) how to settle a consumer s complaint about a faulty item B) how to make an effective complaint about a faulty item C) how to avoid buying a faulty item D) how to deal with complaints from customers Questions 31 to 35 are based on the following passage: When a consumer finds that an item she or he bought is faulty or in some other way does not live up to the manufacturers claim for it, the first step is to present the warranty, or any other records which might help, at the store of purchase. In most cases, this action will produce results. However, if it does not, there are various means the consumer may use to gain satisfaction. 注：1.present v. 提交 2.主题句后将介绍其他不同投诉的方法 A simple and common method used by many consumers is to complain directly to the store manager. In general, the higher up the consumer takes his or her complaint, the faster he or she can expect it to be settled. In such a case, it is usually settled in the consumer s favor, assuming he or she has a just claim. 注：the more...the more... 比较结构，可以跟32题联系在一起。 （到此处，文章后面的题目中有4道题已经可以定位了。31题、32题、34题和35题） | 
