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Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of numbered blanks from 23 to 32.

Bonsai trees have always been a source of great fascination to people. They are perfect miniatures, grown in pots small enough to sit on a windowsill. You have to keep reminding yourself that these trees are (23) ___________ real and identical to their larger cousins in all respects except their size. Rather like other small and perfectly-formed artifacts, bonsai trees, (24) ___________ quite a high price in the marketplace and so it doesn‟t come as a great surprise to find that they also attract the attention of thieves. It seems that quite a flourishing business has (25) ___________, in which they are stolen from the homes of grower and collectors, then reported and trimmed by unscrupulous dealers, to be sold on, at good prices, to unsuspecting buyers.

One of Britain‟s top collectors of bonsai trees, Paul Widdington, believes that he has found a solution, however. After losing his life‟s work, (26) ___________ at £250,000, when burglars broke into his home one night, Paul decided to (27) ___________ the possibilities of electronically tagging the trees he bought as a replacement. This (28)___________ injecting a microchip the size of a (29) ___________ of rice intro trunk of each tree. Each chip is a laser-etched with information which is (30) ___________ in a central register held by the police. Paul is quite aware that this kind of datatagging doesn‟t prevent thieves from stealing the trees in the first (31) ___________, although it may increase the (32) ___________ of getting them back. So he‟s also installing a security alarm system, complete with infra-red detectors, in his home.

Điền vào ô số 32

A. choices 

B. counts 

C. claims 

D. chances

Mark the letter A, B, C or D on your answer to indicate the correct answer to each of the question from 1 to 10.

The first two decades of this century were dominated by the microbe hunters. These hunters had tracked down one after another of the microbes responsible for the most dreaded scourges of many centuries: tuberculosis, cholera, diphtheria. But there remained some terrible diseases for which no microbe could be incriminated: scurvy, pellagra, rickets, beriberi. Then it was discovered that these diseases were Câused by the lack of vitamins, a trace substance in the diet. The diseases could be prevented or cured by consuming foods that contained the vitamins. And so in the decades of the 1920‟s and 1930‟s, nutrition became a science and the vitamin hunters replaced the microbe hunters.

In the 1940‟s and 1950‟s, biochemists strived to learn why each of the vitamins was essential for health. They discovered that key enzymes in metabolism depend on one or another of the vitamins as coenzymes to perform the chemistry that provides cells with energy for growth and function. Now, these enzyme hunters occupied center stage.

You are aware that the enzymes hunters have been replaced by a new breed of hunters who are tracking genes – the blueprints for each of the enzymes – and are discovering the defective genes that Câuse inherited diseases – diabetes, cystic fibrosis. These gene hunters, or genetic engineers, use recombinant DNA technology to identify and clone genes and introduce them into bacterial cells and plants to create factories for the massive production of hormones and vaccines for medicine and for better crops for agriculture. Biotechnology has become a multibillion-dollar industry.

In view of the inexorable progress in science, we can expect that the gene hunters will be replaced in the spotlight. When and by whom? Which kind of hunter will dominate the scene in the last decade of our century and in the early decades of the next? I wonder whether the hunters who will occupy the spotlight will be neurobiologists who apply the techniques of the enzyme and gene hunters to the functions of the brain. What to call them? The head hunters. I will return to them later.

Which of the following best describes the author‟s tone in the last paragraph of the passage?

A. Emotional 

B. Critical 

C. Appreciative 

D. Speculative