Having taken our seats, _______.         [     ]     A. the pr来自ofe...

Having taken our seats, _______.         [     ]     A. the pr来自ofe...

问题补充说明：Having taken our seats, _______.   [     ] A. the professor began the lecture  B. the lecture began soon C. we were attracted by the lecture soon D. the bell announced the beginning of the lecture

C