Scientists are convinced ______ the positive effect of laughter ______ physical
题型：不详难度：来源：
Scientists are convinced ______ the positive effect of laughter ______ physical and mental health.| A．of；at | B．by；in | C．of；on | D．on；at |
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答案
| C |
解析
试题分析：考查固定词组。固定词组be convinced of相信…；have an effect on…对…有影响；句意：科学家们相信微笑对于身体很精神健康都有积极的影响。故C正确。
点评：be convinced of相信…；have an effect on…对…有影响；对于形容词的短语搭配在平时的学习中也要注意识记和辨析。 |
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