第49题___________

A．Some people might want to learn some of these songs by hearts.

B．Papua New Guinea is an extremely rich source of different language, but more than 100of them are in danger of extinction ( 灭绝 ) .

C．However, he was a frequent visitor to the Catawba reservation in South Carcinoma where he learned the language.

D．These languages don't have many native speakers.

E．For the rest of us, when a language dies, we lose the possibility of a unique way of seeing and describing the world.

F．As these languages become more powerful, their use as tools of business and culture increase.

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参考答案

答案解析

从原文来看，空白处前面一句讲的是Red Thunder Cloud并非出生在卡托巴，而且卡托巴语也不是其母语；空白处后一句讲的是他为Smithsonian机构所唱的歌曲使得美洲本土的音乐流行起来。因此，空白处谈论的还是RedThunderCloud唱歌的问题，所以C(但是，他经常访问South Carcinoma的Catawba的保留地，并在那里学会了这种语言)比较符合原文语义，从逻辑上解释了为什么卡托巴不是Red Thunder Cloud的母语，但是他却会唱卡托巴语的歌曲，符合上下文逻辑一致的原则。

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1 第50题___________

A．Some people might want to learn some of these songs by hearts.

B．Papua New Guinea is an extremely rich source of different language, but more than 100of them are in danger of extinction ( 灭绝 ) .

C．However, he was a frequent visitor to the Catawba reservation in South Carcinoma where he learned the language.

D．These languages don't have many native speakers.

E．For the rest of us, when a language dies, we lose the possibility of a unique way of seeing and describing the world.

F．As these languages become more powerful, their use as tools of business and culture increase.

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2 请根据短文内容，回答题。

The Tough Grass that Sweetens Our Lives

Sugar cane was once a wild grass that grew in New Guinea and was used by local people for roofing their houses and fencing their gardens. Gradually a different variety evolved which contained sucrose (蔗糖) and was chewed on for its sweet taste. Over time, sugar cane became a highly valuable commercial plant, grown throughout the world. __________ (46)
Sugar became a vital ingredient in all kinds of things, from confectionery (糖果点心 ) to medicine, and, as the demand for sugar grew, the industry became larger and more profitable.
__________ (47) Many crops withered( 枯萎)and died, despite growers' attempts to save them, and there were fears that the health of the plant would continue to deteriorate.
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第46题___________

A．Eventually, a commercial plant was developed which was 5 percent sweeter than before,but also much stronger and less likely to die from disease.

B．One major gene has been identified by Dr Angelique D'Hont and her team in Montpelier,France.

C．Sugar cane is now much more vigorous and the supply of sugar is therefore more guaranteed.

D．Since the 1960s, scientists have been analyzing the mysteries of the sugar cane's genetic code.

E．The majority of the world's sugar now comes from this particular commercial species.

F．Unfortunately, however, the plant started to become weaker and more prone to disease.

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3 第47题___________

A．Eventually, a commercial plant was developed which was 5 percent sweeter than before,but also much stronger and less likely to die from disease.

B．One major gene has been identified by Dr Angelique D'Hont and her team in Montpelier,France.

C．Sugar cane is now much more vigorous and the supply of sugar is therefore more guaranteed.

D．Since the 1960s, scientists have been analyzing the mysteries of the sugar cane's genetic code.

E．The majority of the world's sugar now comes from this particular commercial species.

F．Unfortunately, however, the plant started to become weaker and more prone to disease.

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