下面共有15个句子，每个句子中均有1个词或短语画有底横线，请从每个句子后面所给的4个选项中选择1个与画线部分意义最相近的词或短语。

1、 Techniques toemploy the energy of the sun are being developed. A.convertB.storeC.utilizeD.receive

2、 Since the GreatDepression, the United States government has protected farmers from damagingdrops in grain prices. A.slightB.surprisingC.suddenD.harmful

3、 Medicine dependson other fields for basic information, particularly some of their specializedbranches. A.conventionallyB.obviouslyC.especiallyD.inevitably

4、 An important partof the national government is the Foreign Service, a branch of the Departmentof the State. A.a unityB.a divisionC.an embassyD.an invitation

5、 We were astonishedto hear that their football team had won the champion. A.amazedB.amountedC.amusedD.approached

6、 There is anabundant supply of cheap labor in this country. A.a steadyB.a plentifulC.an extraD.a stable

7、 All livingorganisms, regardless of their unique identity, have certain logical, chemical,and physical characteristics in common. A.as a result ofB.consideringC.on purposeD.whatever

8、 The most crucialproblem any economic system faces is how to use its scarce resources. A.puzzlingB.difficultC.terrifyingD.urgent

9、 Human facialexpressions differ from those of animals in the degree to which they can bedeliberately controlled and modified. A.sufficientlyB.noticeablyC.intentionallyD.absolutely

10、 The Constitutionsvague nature has given it the flexibility to be adapted when circumstanceschange. A.impreciseB.conciseC.unpolishedD.elementary

11、 The expeditionreached the summit at 10:30 that morning. A.top of the mountainB.bottom of that morningC.starting pointD.site

12、 The latest censusis encouraging. A.countB.statementC.agreementD.estimate

13、Academic recordsfrom other institutions often become part of a university''s official file andcan neither be returned to a student nor duplicated. A.borrowedB.purchasedC.copiedD.rewritten

14、 While serving inthe Senate in the early 1970s Barbara Jordan supported legislation to bandiscrimination and to deal with environment problems. A.listB.forbidC.handleD.investigate

15、 Gambling is lawfulin Nevada. A.legalB.irresistibleC.enjoyableD.profitable

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