第19题: [单项选择]One famous physician always ______ to spend at least 15 minutes on general reading before he went to sleep each night. A. made that a rule B. made it a rule C. made rules D. made this a rule 参考答案:B 答案解析:make it a rule“使之成为规律”，it是形式宾语，指代to后引导的内容。
第25题: [单项选择]Loudspeakers were fixed in the hall so that everyone ______an opportunity to hear the speech. A. ought to have B. must have C. may have D. should have 参考答案:D 答案解析:译文：礼堂里安装了扩音器，以便大家都可以听到演讲。so that引导的目的状语从句，从句中常用may。但是本句主句用的是过去时态，所以从句也应该用相应的表示过去的时态，只有should have符合要
