[10-20 18:11:12] 来源：http://www.67xuexi.com 高一英语 阅读：85814次
45．A stand B．cooperate C．work D．help
46．A.work B．job C．position D．chance
47．A.offices B．schools C．shops D．places
48．A.better B．same C．less D．important
49．A.tired B．afraid C．fond D．proud
50．A.place B．walk C．way D．journey
51．A.cry B．smile C．laugh D．sob
52．A.long B．far C．soon D．much
53．A.new B．good C．important D．pleasing
54．A.So B．And C．But D．Or
55．A.progress B．improvement
C．decisions D．changes
第三部分：阅读理解(共20小题；每小题2分，满分40分)
A
Scientists are working to develop crop plants that can reduce the amount of water used for agriculture.
Almost sixty percent of the world’s freshwater withdrawals from rivers，lakes and other water resources
go toward irrigating fields.Scientists are using biotechnology as well as traditional breeding methods
to develop watersaving crops to feed a growing world.
Tommy Carter is a plant scientist in North Carolina working for the Agricultural Research Service
in the United States Department of Agriculture.He leads Team Drought，a group of researchers at five
universities.They have been using conventional breeding methods to develop soybeans that can
grow well under dry conditions.Tommy started working on droughtresistant soybeans in 1981.His
research has taken him as far as China，where soybeans have been grown for thousands of years.
Farmers in the United States，however，have grown soybeans for only about a century.Tommy
Carter says the soybeans they grow are for the most part genetically similar.More differences could
better protect crops against climate changes that can reduce production.Those changes include
water shortages which could increase from global warming.The Agriculture Department has a soybean
germplasm collection (种质收集)，a collection of genetic material passed from one generation to the
next.Members of Team Drought studied more than 2,500 examples from the collection.They looked
at those from Asia and searched for germplasms that could keep plants from weakening and wilting
(枯萎) during hot，dry summers in the United States.
Tommy says they found only five，but these slowwilting lines can produce more than normal
soybeans under drought conditions.The team is now doing field tests.The first breeding line is
expected to be released next year for use by private seed companies and public soybean breeders.
Scientists are also working on other crop plants that either use less water or use it better，or both.
56．The scientists are developing the crop plants because________.
A．traditional crop plants can’t grow under dry conditions
B．only biotechnology could lead to a success in this area
C．irrigating fields has used almost 60% of our freshwater
D．we need new crops to save more water than ever before
57．From the passage we know that Tommy Carter________.
A．is now teaching at five universities
B．organized Team Drought in 1981
C．once went to China to study soybeans
D．discovered the genetic material of soybeans
58．According to the passage，the five examples from Asia need less water under drought
conditions because________.
A．soybeans have been grown in Asia for thousands of years
B．the germplasms are different from those of American soybeans
C．the history of soybeans growing in America is only a century
D．the problem of water shortages in Asia is much more serious
59．What will the writer most probably write about next?
A．Some other research on crops that use less water.
B．The conclusion that less water is needed for soybeans.
C．More information about Tommy Carter’s new soybeans.
D．The reason why the climate changes have taken place.
60．The passage is mainly talking about________.
A．conventional methods of plants breeding
B．efforts to develop crops using less water
C．the history of soybeans growing in China
D．what some scientists do to change the climate
B
Science and technology students in China and the US have a long way to go before they can develop
a deep understanding of scientific reasoning，researchers have found.
As part of a research to compare science education in China and the US，Lei Bao，a professor from
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