第18题: [单项选择]We carved their names on the stone so that younger generations could know what their forefathers______for the nation. A. did B. were doing C. had done D. have been doing 参考答案:C 答案解析:[考点] 过去完成时
[解析] 在动作carved发生以前,从句中的动作已经发生了,所以从句中的时态应该比主句的时态更早。主句用一般过去时,从句应该用过去完成时。
第26题: [单项选择]肺炎患者提供的能量为() A. 1000~1200kcal/d B. 1200~1500kcal/d C. 1500~1800kcal/d D. 1800~2000kcal/d E. 2000~2400kcal/d 参考答案:E 答案解析:考查肺炎患者的能量供应。肺炎是消耗性疾病,必须增加总能量的供应。