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3.Scientists are working to develop plants that need less water.Thomas Tommy Carter is a plant scientist from the United States.He leads a group of researchers at five universities.They have developed soybeans (大豆)that can grow well in dry conditions.
Tommy Carter started working on drought-resistant(抵御干旱的)soybeans in 1981.His research has taken him as far as China,where soybeans have grown for thousands of years.
"Farmers in the United States,however,have grown soybeans for only about a century."Tommy Carter says,"More differences could better protect the plants like soybeans against climate(气候.)changes."
The US Agriculture Department has a great soybean collection.Tommy Carter and his group studied over 2,500examples from the collection They searched for germplasms(胚质)that could keep the plants growing during hot,dry summers in the United States.The group is now doing field tests.

76.What does Tommy Carter do?He's a (plant) scientist/A (plant) scientist
77.Which country has he been to for his research?He's been to China./China
78.How long have the US farmers grown soybeans?They have grown soybeans for only about a century./(For) (only) about a century./(For) (only) about 100 years.
79.Tommy Carter and his group studied more than 2,500 examples from the collection,didn't they?Yes,they did.
80.What's the purpose of their research?The purpose (of their research) is to develop plants that need less water..

分析 【文章主旨】这是一篇有关科技方面的阅读,短文主要讲的是植物科学家Tommy Carter和他的团队一直在研究一种需水量少的抗旱的植物.并为此还远赴中国,并且现在还在研究能在美国炎热,干燥的夏天也能生长种植.

解答 76.He's a (plant) scientist/A (plant) scientist【解析】细节理解题.根据文中第一段中Thomas Tommy Carter is a plant scientist from the United States.可知Thomas Tommy的职业是一名植物科学家,所以答案应为He's a (plant) scientist/A (plant) scientist.
77.He's been to China./China.【解析】细节理解题.根据文中第二段中His research has taken him as far as China,可知他曾为了研究跑到了遥远的中国,再结合题干,所以答案应为He's been to China./China.
78.They have grown soybeans for only about a century./(For) (only) about a century./(For) (only) about 100 years.【解析】细节理解题.根据文中第三段中Farmers in the United States,however,have grown soybeans for only about a century可知美国的农民种植大豆的时间只有差不多一个世纪的历史.可得答案应为They have grown soybeans for only about a century./(For) (only) about a century./(For) (only) about 100 years.(三种都可)
79.Yes,they did.【解析】细节理解题.根据文中最后一段中Tommy Carter and his group studied over 2,500examples from the collection可明显得出题干内容符合文意,所以答案应为Yes,they did.
80.The purpose (of their research) is to develop plants that need less water.【解析】推理分析题.纵观全文,分别从第一段中的They have developed soybeans (大豆)that can grow well in dry conditions.他们所领导的一个研究小组已经开发出可以在干旱条件下生长良好的大豆.以及最后一段中的They searched for germplasms(胚质)that could keep the plants growing during hot,dry summers in the United States.他们寻找一种在美国炎热,干燥的夏天也能生长的种质.可以得出他们研究的目的是研发一种需水量少的抗旱的植物.所以答案应为The purpose (of their research) is to develop plants that need less water.

点评 这篇短文内容比较简单,理解不难.各小题与上下文联系比较紧密,然后从中找出相关的信息,写出正确答案,答完后多读几遍,看看是否符合逻辑,适当修改.

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