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Câu hỏi: 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 from 35 to 42.
UFO - HAVE WE BEEN VISITED?
On a cold, dark winter's evening in 1988, Jon Hickes and Richard Williams were driving to a friend's house near Canterbury when they saw a bright red object glowing above the fields about 500 meters in front of them. As they drove nearer to Investigate they were amazed to find a large area of molten metal, bubbling on the ground like a pool of volcanic lava. When firemen arrived shortly after, it took them over an hour to cool down the boiling mass and make it safe.
Samples of the solidified metal were taken to the nearby University of Kents where they were found to contain iron and small amounts of tin and chromium. James Radcliffe, a specialist at the university, concluded that material such as this could not have come from a meteor, and military experts, for their part, were quick to point out that it could not have fallen from any aero plane or spacecraft; space debris does not hit the earth's surface in a liquid state.
Of course, there were suggestion that the whole thing might have been a hoax, but a practical joke on this scale would have been very difficult to set up. The only factory In the area capable of producing molten metal had recently closed down, and besides, arranging for large quantities of the metal to be dropped from the sky would not be very easy. Clearly, this was not a simple open-and-shut matter.
Unexplained aerial phenomena of this nature have been observed and noted down for centuries, but the modern preoccupation with UFOs began in 1947, when there were an unusually large number of reported sightings. In the last 50 years there have been over 10,000 such reports in Britain alone. Most of these can be attributed to man-made objects such as aircraft and satellites, or astronomical phenomena such as shooting stars. Just over five per cent of case, however, remained unexplained, leading many UFO experts to the conclusion that aliens have indeed visited our planet.
In another case in the 1980s Les and Linda Burnham were cycling together along a country road near Rye in Sussex when a sudden, blinding light almost caused them to fall off their bicycles. As the couple stopped to cover their eyes, they felt intense heat and heard a defeating roar like sound of high-speed train. A minutes or so later they were able to look up again, and were greeted with the sight of a huge, diamond-shaped metal object floating above the treetops, spitting flames and emitting a loud, high-pitched noise. They watched in shocked silence as the gigantic structure climbed high into the air and disappeared from nowhere and raced off after the mysterious object.
As they cycled the short distance home, Les and Linda suffered headaches and sickness, and during the next few days experienced diarrhea and minor skin burn. As a result of illness and depression Linda was unable to go to work for nearly six week.
Underneath where the object had been floating, an area of woodland had burnt down, electricity cables had burnt down, electricity cables has snapped and the road surface had melted. Whatever caused it, the heat must have been incredibly intense to do all that. As for the jet aircraft, military bases denied all knowledge of them and to this day their origin, like that of the diamond-shaped object, remains a mystery.
'It' in paragraph 2 refers to
A. a meteor
B. a spacecraft
C. the metal
D. the university
UFO - HAVE WE BEEN VISITED?
On a cold, dark winter's evening in 1988, Jon Hickes and Richard Williams were driving to a friend's house near Canterbury when they saw a bright red object glowing above the fields about 500 meters in front of them. As they drove nearer to Investigate they were amazed to find a large area of molten metal, bubbling on the ground like a pool of volcanic lava. When firemen arrived shortly after, it took them over an hour to cool down the boiling mass and make it safe.
Samples of the solidified metal were taken to the nearby University of Kents where they were found to contain iron and small amounts of tin and chromium. James Radcliffe, a specialist at the university, concluded that material such as this could not have come from a meteor, and military experts, for their part, were quick to point out that it could not have fallen from any aero plane or spacecraft; space debris does not hit the earth's surface in a liquid state.
Of course, there were suggestion that the whole thing might have been a hoax, but a practical joke on this scale would have been very difficult to set up. The only factory In the area capable of producing molten metal had recently closed down, and besides, arranging for large quantities of the metal to be dropped from the sky would not be very easy. Clearly, this was not a simple open-and-shut matter.
Unexplained aerial phenomena of this nature have been observed and noted down for centuries, but the modern preoccupation with UFOs began in 1947, when there were an unusually large number of reported sightings. In the last 50 years there have been over 10,000 such reports in Britain alone. Most of these can be attributed to man-made objects such as aircraft and satellites, or astronomical phenomena such as shooting stars. Just over five per cent of case, however, remained unexplained, leading many UFO experts to the conclusion that aliens have indeed visited our planet.
In another case in the 1980s Les and Linda Burnham were cycling together along a country road near Rye in Sussex when a sudden, blinding light almost caused them to fall off their bicycles. As the couple stopped to cover their eyes, they felt intense heat and heard a defeating roar like sound of high-speed train. A minutes or so later they were able to look up again, and were greeted with the sight of a huge, diamond-shaped metal object floating above the treetops, spitting flames and emitting a loud, high-pitched noise. They watched in shocked silence as the gigantic structure climbed high into the air and disappeared from nowhere and raced off after the mysterious object.
As they cycled the short distance home, Les and Linda suffered headaches and sickness, and during the next few days experienced diarrhea and minor skin burn. As a result of illness and depression Linda was unable to go to work for nearly six week.
Underneath where the object had been floating, an area of woodland had burnt down, electricity cables had burnt down, electricity cables has snapped and the road surface had melted. Whatever caused it, the heat must have been incredibly intense to do all that. As for the jet aircraft, military bases denied all knowledge of them and to this day their origin, like that of the diamond-shaped object, remains a mystery.
'It' in paragraph 2 refers to
A. a meteor
B. a spacecraft
C. the metal
D. the university
Câu trả lời dựa vào thông tin ". . . that material such as this could not have come from a meteor, and military experts, for their part, were quick to point out that it could not have fallen from any aero plane or spacecraft..."
Đáp án C.