Scientists are convinced _____ the positive effect of laughter _____ physical and mental health.
A.of; onB.by; inC.of; atD.on; at在线课程A
解析:
试题
分析:考查固定搭配。Be convinced of相信…;
对…信服;
第二空前面的effect要和介词on连用;
句意:科学家们相信大笑对身体和精神都有积极的影响。故A正确。考点:考查固定搭配
点评:在高中英语里有很多的固定搭配,有名词和动词的搭配,也有名词和介词的搭配,在平时要加强积累,此类的固定搭配属于最基本的知识,如果学生有错误,则应该加强背诵并平时多解题,进而加以巩固
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