第2题: [单项选择]He frequently wandered from his text to ______ on a point that had obviously caught his audience's interest. A. elaborate B. stress C. interrupt D. illustrate 参考答案:A 答案解析:(elaborate on/upon详述)。句意为:他经常偏离正题,详述某个显然能引起听众兴趣的论点。B.stress强调;C.interrupt打扰;D.illustrate阐明。