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16-20 Two main techniques have been used for training elephants, which we may call respectively the tough and the gentle. The former method simply consists of setting an elephant to work and beating him until he does what is expected. Apart from any moral considerations this is a stupid method of training, for it produces a resentful animal who at a later stage may well turn man-killer. The gentle method requires more patience in the early stages, but produces a cheerful, good-tempered elephant who will give many years of loyal service. The first essential in elephant training is to assign to the animal a single mahout who will be entirely responsible for the job. Elephants like to have one master just as dogs do, and are capable of a considerable degree of personal affection. There are even stories of half-trained elephant calves who have refused to feed and pained to death when by some unavoidable circumstance they have been deprived of their own trainer. Such extreme cases must probably be taken with a grain of salt, but they do underline the general principle that the relationship between elephant and mahout is the key to successful training. The most economical age to capture an elephant for training is between fifteen and twenty years, for it is then almost ready to undertake heavy work and can begin to earn its keep straight away. But animals of this age do not easily become subservient to man, and a very firm hand must be employed in the early stages. The captive elephant, still roped to a tree, plunges and screams every time a man approaches, and for several days will probably refuse all food through anger and fear. Sometimes a tame elephant is tethered nearby to give the wild one confidence, and in most cases the captive gradually quietens down and begins to accept its food. The next stage is to get the elephant to the training establishment, a ticklish business which is achieved with the aid of two tame elephants roped to the captive on either side. When several elephants are being trained at one time, it is customary for the new arrival to be placed between the stalls of two captives whose training is already well advanced. It is then left completely undisturbed with plenty of food and water so that it can absorb the atmosphere of its new home and see that nothing particularly alarming is happening to its companions when it is eating normally, its own training begins. The trainer stands in front of the elephant holding a long stick with a sharp metal point. Two assistants, mounted on tame elephants, control the captive from either side, while others rub their hands over his skin to the accompaniment of a monotonous and soothing chant. This is supposed to induce pleasurable sensations in the elephant, and its effects are reinforced by the use of endearing epithets, such as ’ho! my son’, or ’ho! My father’, or ’my mother’ according to the age and sex of the captive. The elephant is not immediately susceptible to such blandishments, however, and usually lashes fiercely with its trunk in all directions. These movements are controlled by the trainer with the metal-pointed stick, and the trunk eventually becomes so sore that the elephant curls it up and seldom afterwards uses it for offensive purposes. The ill-treatment of an elephant during training______.

A. can have unpleasant consequences later
B. is the most effective method available
C. increases the time it takes to train the animal
D. ensures loyal service for years to come

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26-30 The biggest safety threat facing airlines today may not be a terrorist with a gun, but the man with the portable computer in business class. In the last 15 years, pilots have reported well over 100 incidents that could have been caused by electromagnetic interference. The source of this interference remains unconfirmed, but increasingly, experts are pointing the blame at portable electronic devices such as portable computers, radio and cassette players and mobile telephones. RTCA, an organization which advises the aviation (航空) industry, has recommended that all airlines ban (禁止) such devices from being used during "critical" stages of flight, particularly take-off and landing. Some experts have gone further, calling for a total ban during all flights. Currently, rules on using these devices are left up to individual airlines. And although some airlines prohibit passengers from using such equipment during take-off and landing, most are reluctant to enforce a total ban, given that many passengers want to work during flights. The difficulty is predicting how electromagnetic fields might affect an aircraft’s computers. Experts know that portable devices emit radiation which affects those wavelengths which aircraft use for navigation and communication. But, because they have not been able to reproduce these effects in a laboratory, they have no way of knowing whether the interference might be dangerous or not. The fact that aircraft may be vulnerable (易受损的) to interference raises the risk that terrorists may use radio system in order to damage navigation equipment. As worrying, though, is the passenger who can’t hear the instructions to turn off his radio because the music’s too loud. The passage is mainly about______.

A. a new regulation for all airlines
B. the defects of electronic devices
C. a possible cause of aircraft crashes
D. effective safety measures for air flight

Shyness is the cause of much unhappiness for a great many people. Shy people are (32) and self-conscious; that is, they are (33) concerned with their own appearance and actions. (34) thoughts are (35) occurring in their minds. What kind of impression am I makingIt is obvious that such (36) feelings must affect people adversely. A person’s self-concept is (37) in the way he or she behaves, and the way a person behaves affects other people’s reactions. (38) , the way people think about themselves has a profound effect on all areas of their lives.Shy people, having low (39) , are likely to be passive and easily influenced by others. They need reassurance (40) they are doing "the right thing". Shy people are very (41) to criticism; they feel it (42) their inferiority. A shy person may (43) to a compliment with a statement like this one: "You’re just saying that to make me feel good." It is clear that, (44) self-awareness is a healthy quality, overdoing it is harmful.Can shyness be completely eliminated, or at least (45) Fortunately, people can over-come shyness with determined and patient effort in building self-confidence. Since shyness goes (46) with lack of self-esteem, it is important for people to accept their weakness as well as their strengths. For example, most people would like to be "A" students in every subject. It is not fair for them to (47) themselves inferior because they have difficulty (48) some areas. People’s expectations of themselves must be (49) .Each one of us is a unique, worthwhile individual. The better we understand ourselves, the easier it becomes to (50) our full potential. Let’s not allow shyness to block our chances for a rich and (51) life. 48().

A. in
B. within
C. with
D. at

Shyness is the cause of much unhappiness for a great many people. Shy people are (32) and self-conscious; that is, they are (33) concerned with their own appearance and actions. (34) thoughts are (35) occurring in their minds. What kind of impression am I makingIt is obvious that such (36) feelings must affect people adversely. A person’s self-concept is (37) in the way he or she behaves, and the way a person behaves affects other people’s reactions. (38) , the way people think about themselves has a profound effect on all areas of their lives.Shy people, having low (39) , are likely to be passive and easily influenced by others. They need reassurance (40) they are doing "the right thing". Shy people are very (41) to criticism; they feel it (42) their inferiority. A shy person may (43) to a compliment with a statement like this one: "You’re just saying that to make me feel good." It is clear that, (44) self-awareness is a healthy quality, overdoing it is harmful.Can shyness be completely eliminated, or at least (45) Fortunately, people can over-come shyness with determined and patient effort in building self-confidence. Since shyness goes (46) with lack of self-esteem, it is important for people to accept their weakness as well as their strengths. For example, most people would like to be "A" students in every subject. It is not fair for them to (47) themselves inferior because they have difficulty (48) some areas. People’s expectations of themselves must be (49) .Each one of us is a unique, worthwhile individual. The better we understand ourselves, the easier it becomes to (50) our full potential. Let’s not allow shyness to block our chances for a rich and (51) life. 50().

A. live for
B. live upon
C. live through
D. live up to

CATSAGia Andina de Triconos (CATSA), a Bolivian joint venture of the U. S. Dresser Industries and local investors, which had based its investment (19) an allocation under the metalworking program, closed its doors after (20) to penetrate the Andean market after more than two years in operation.The prospect of (21) access to the Andean market, plus protection provided by a 55 percent "ad valorem" common outer tariff on bits sourced from outside the bloc, made the sales outlook seem (22) . However, CATSA’s "monopoly" position in Ancom proved specious. (23) the plant went on stream in 1974, the company was never able to export a single drill bit to the Andean market, and its local sales were (24) a state-owned petroleum company. This market was clearly (25) , since the operation had been based on exporting the bulk of the plant’s 200-unit-per-month capacity to the Andean area.CATSA could not penetrate the Ancom market for several reasons:Although Ancom (26) a 55 percent common outer tariff on third-country imports, some Ancom countries had previously (27) LAFTA (Latin American Free Trade Association) tariff concessions, which take precedence over the Ancom tariffs.Ancom members simply did not (28) the spirit of the metalworking agreement. After the installation of the CATSA facility, plants producing tricorne bits (29) in Peru and Venezuela. Under the metalworking program, participating (30) were committed to prohibiting new foreign investment in allocations of other Ancom countries. But on the question of new investment by local industry, the obligation was only not to encourage it, with no requirement to prevent it. (31) Venezuela, it has no commitment to limit local production or to honour the outer tariff, because it was not yet a member of Ancom when the metalworking agreement was signed and was thus not a (32) to the pact. Also, according to Bolivia, Colombia and Ecuador employed (33) obstacles to avoid applying the common outer tariff.The withdrawal of Chile from Ancom cost Bolivia a lucrative potential market, too. 20()

A. fail
B. to fail
C. failing
D. succeeding

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