Having taken our seats .A. the professor began the lectureB. the lecture began soonC. we w

问题补充：

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

答案：

A. the professor began the lecture

B. the lecture began soon

(答案→)C. we were attracted by the lecture soon

D. the bell announced the beginning of the lecture

解析：考查句子理解。句意：我们就坐以后，可知下文描述的应是我们的动作，选项ABD不和逻辑，故选C，我们很快被演讲吸引了。