第28题: [单项选择]喉腔最狭窄的部位是() A. 喉口 B. 前庭裂 C. 喉中间腔 D. 声门裂 E. 声门下腔 参考答案:D
第29题: [单项选择]All the students are busy with the revision prior to the final exam. A. during B. after C. before D. for 参考答案:C 答案解析:[解析] 期末考试前所有学生都忙着复习。句中prior to:在…之前。during:在…期间,如:The thief broke into the house during the night.小偷