Scientists are convinced ________ the positive effect of laughter ________ physi
题型：不详难度：来源：
Scientists are convinced ________ the positive effect of laughter ________ physical and mental health.| A．of; at | B．on; at | C．by; in | D．of; on |
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答案
| D |
解析
试题分析：第一空考查短语be convinced of的用法，意为：相信。第二空on意为：在……方面。句意：科学家们相信笑对身体和精神健康有积极作用。 |
举一反三
With a population of over seven million, London is ________ the largest cities of the world.| A．between | B．among | C．from | D．of |
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_____ all our efforts to save the school, the authorities decided to close it.| A．In spite of | B．In case of | | C．In need of | D．In terms of |
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Having lived in the town for many years，Mr. Smith no longer felt ________ among the local people.| A．out of control | B．out of touch | | C．out of place | D．out of use |
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