第32题: [单项选择]The psychologist picked several students ______ and said that they were highly intelligent and would achieve great success. A. by accident B. at random C. on occasion D. by chance 参考答案:B 答案解析:[试题分析] 介词短语辨析题。
[详细解答] at random意为“随便地,任意地”。by accident和by chance意为“偶然地.无意中”。on occasion意为“间或,有时”。