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  • 更新 2022-09-03
  • 科目 英语
  • 题型 完型填空
  • 难度 中等
  • 浏览 1977

Though giant pandas may appear perfectly happy chewing bamboos, scientists recently discovered that they would rather have something sweeter. Scientists chose         because the animals are herbivores (食草动物), which would mean that they would love sweets. However, the plant they choose, the bamboos, has a very             sugar content and is therefore not considered sweet. Could this mean that pandas have            their hobby for sweet things?
The pandas were given six kinds of sweet liquids that are         found in fruits and vegetables. They were also given         at the same time. In each of the taste tests, the animals           the natural sweeter liquids and ignored the water            . They ate up all the sweet liquids and the water was left untouched.
What was even more interesting is that when the scientists           the water with five different man-made sweeteners, ones that humans find delicious, the pandas were not as           . In these tests, they picked the water instead. The scientists believe that it could be either because pandas found them to be too            or not sweet enough and that the mixture could not            the pandas.
The scientists were not too             by the results, since pandas in zoos have always shown a preference for treats like apples, sweet potatoes and even mooncakes. Scientists believe that the pandas may have once             sweeter foods that were available in the lowland areas that they used to live in. But when human settlement in the lowland areas           them to the bamboo forests in the mountains, they had no            but to settle for the almost sugarless plants.

A.horses B.bears C.monkeys D.pandas

A.high B.simple C.low D.different

A.lost B.followed C.started D.kept

A.specially B.hardly C.naturally D.rarely

A.fruits B.water C.bamboos D.oxygen

A.picked B.hid C.rejected D.shared

A.largely B.gradually C.occasionally D.completely

A.mixed B.covered C.exchanged D.replaced

A.funny B.picky C.perfect D.interested

A.salty B.sweet C.sour D.hot

A.harm B.save C.attract D.change

A.Delighted B.surprised C.disappointed D.concerned

A.Enjoyed B.disliked C.controlled D.ignored

A.Encouraged B.forced C.introduced D.guided

A.desire B.chance C.wonder D.choice

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