精英家教网 > 高中英语 > 题目详情

Having taken our seats,_______________________.


  1. A.
    the professor began the lecture
  2. B.
    the lecture began soon
  3. C.
    we were attracted by the lecture soon
  4. D.
    the bell announced the beginning of the lecture
练习册系列答案
相关习题

科目:高中英语 来源:同步题 题型:单选题

Only __________according to the directions can the medicine be quite effective.    
[     ]
A. taking                        
B. taken    
C. being tak'en                  
D. having been taken

查看答案和解析>>

同步练习册答案