第7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34题: [单项选择]Education and experience in these areas may be necessary to train one competently to prescribe and monitor medications, and hence to decrease potential ______. A. liberality B. libation C. freedom D. liability 参考答案:D 答案解析:[注释]liability 一词在近年来的考研题中反复出现，意指“责任”、“义务”；复数用法指“债务、负债”
