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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 answer for each of the questions
Humans have struggled against weeds since the beginnings of agriculture. Marring our gardens is one of the milder effects of weeds – any plants that thrive where they are unwanted. They clog waterways, destroy wildlife habitats, and impede farming. Their spread eliminates grazing areas and accounts for one-third of all crop loss. They compete for sunlight, nutrients, and water with useful plants.
The global need for weed control had been answered mainly by the chemical industry. Its herbicides are effective and sometimes necessary, but some pose serious problems, particularly if misused. Toxic compounds threaten animal and public health when they accumulate in food plants, groundwater, and drinking water. They also harm workers who apply them.
In recent years, the chemical industry has introduced several herbicides that are more ecologically sound. Yet new chemicals alone cannot solve the world’s weed problems. Hence, scientists are exploring the innate weed-killing powers of living organisms, primarily insects and microorganisms.
The biological agents now in use are environmentally benign and are harmless to humans. They can be chosen for their ability to attack selected targets and leave crops and other plants untouched. In contrast, some of the most effective chemicals kill virtually all the plants they come in contact with, sparing only those that are naturally resistant or have been genetically modified for resistance. Furthermore, a number of biological agents can be administered only once, after which no added applications are needed. Chemicals typically must be used several times per growing season.
Which of the following best describes the organization of the passage?
A.Two possible causes of a phenomenon are compared.
B.A problem is described and possible solutions are discussed.
C.A general idea is introduced and several specific examples are given.
D.A recommendation is analysed and rejected

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions
If there is a building which symbolizes a country, such as the Eiffel Tower for France and Sydney Opera House for Australia, then it has to be the Taj Mahal for India .
It was set up by Emperor Shah Jahan in 1653 in memory of his wife, Mumtaz Mahal. From the time they got married, they wouldn’t be separated . She followed him to wars, advised him on affairs of state, and was loved by his people for her good work. But she died in 1631 during her childbirth. The emperor was heartbroken and had the Taj Mahal built as a sign of his love.
It took more than 20 years for the Taj Mahal to be built. Workers were brought in, not only from all over India, but from central Asia too. A total of 20,000 people worked on the building.
In 1657, Shah Jahan fell ill and in 1658 his son, Aurangzeb, imprisoned his father and seized power. Shah Jahan stayed in prison until his death in 1666. He was finally buried there with his wife, who he could never forget.
The Taj Mahal is definitely worth more than a single visit. As it is built with white marble stones, its character changes in different lights. It looks more beautiful at sunrise and sunset. At sunset, for example, the color of the Taj Mahal changes from white to yellow, then to pink. As the moon rises, it turns a silvery white.
To show respect to the Taj Mahal, tourists are asked to take off their shoes during their visit.
Why did Emperpor Shah Jahan build the Taj Mahal?
A.To give his wife great honour.     
B.To memorize his wife.
C.To make more world wonders.    
D.To show his great power.

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