Having taken our seats, ______. A．the pr
题型：选择题
问题：
Having taken our seats, ______.
A．the professor began the lecture
B．the lecture began in no time
C．we were attracted by the lecture immediately
D．the bell announced the beginning of the lecture
Having taken our seats, ______.
A．the professor began the lecture
B．the lecture began in no time
C．we were attracted by the lecture immediately
D．the bell announced the beginning of the lecture