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题目
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Scientists are convinced ________the positive effect of laughter________ physical and mental          health.
A.of; atB.of; onC.by; inD.on; at

答案
B
解析
考查介词辨析。be convinced of 相信… ; “对…有影响” 应用介词on。句意:科学家们相信笑声对身体和精神健康有积极地影响。故B正确。
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试题【Scientists are convinced ________the positive effect of laughter________ physica】;主要考察你对介词和介词短语等知识点的理解。[详细]
举一反三
_______ her leg was wounded, she _______ up the stairs.
A.In spite of; managed to getB.In spite of; succeeded getting
C.Although; managed gettingD.Although; managed to get

题型:不详难度:| 查看答案
– Has the professor’s talk got____ to do with your present research?
– Yes, it has____ to do with my research.
A.nothing; a lot ofB.something; nothing
C.anything; a lotD.anything; little

题型:不详难度:| 查看答案
–How was your interview with the famous basketball player—Yao Ming?
--I was quite nervous at first, but his warm smile put me____.
A.in actionB.at easeC.on workD.on watch

题型:不详难度:| 查看答案
Sending Sandra a letter was ________,because her husband might intercept (截取)  it.
A.out of questionB.out of the question
C.in questionD.of question

题型:不详难度:| 查看答案
His grandmother likes finding fault ________ others who talk with her ________ the spot.
A.with;inB.with;onC.in;onD.in;in

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