第15题: [单项选择]Questions 19 to 22 are based on the conversation you have just heard. A. Her phone number. B. The location of the apartment. C. The best time to call her. D. Her first nam 参考答案:A 答案解析:[听力原文] Which of the following does Cecilia initially forget to tell Mark [详细解答] 告内容提
第27题:[单选题] 切割牙体组织引起牙髓反应的因素为 A. 切割了牙本质 B. 切割了牙本质小管及其中的造牙本质细胞突 C. 切割时的摩擦、热 D. 切割时牙本质失水 E. 包括以上各项 参考答案:E
第28题: [单项选择]Only rarely ______ earthquakes occur in the United States east of the Mississippi River. A. had B. when C. that D. do 参考答案:D 答案解析:这是个倒装形式。only位于句首并且后面跟状语时,句子的主谓需倒装,根据上下文,本句陈述的是一般事实,用一般现在时。本句的谓语动词为实义动词occur,所以用助动词do前置来倒装。