第29题: [单项选择]心肌梗死的疼痛症状多发生在() A. 清晨 B. 下午 C. 上午 D. 中午 E. 夜间 参考答案:A
第30题: [单项选择]The passengers and the suitcases ______ were still waiting had to be transferred to another plane. A. which B. that C. who D. whom 参考答案:B 答案解析:仍在等待的乘客和行李只得改乘另一架飞机。此句考查定语从句中的关系代词。此处的关系代词需要指代主句中的the passengers and the suitcases,既指人又指物,所以只能用that。