With all the audience the speech began.A. satB. seatingC. seatedD. having seated

问题补充：

With all the audience , the speech began.

A. sat

B. seating

C. seated

D. having seated

答案：

A. sat

B. seating

(答案→)C. seated

D. having seated

解析：考查with复合结构：with+宾语+宾语补足语，可以做原因状语，the audience和seat是被动关系，句意：所有的观众都坐下来，演讲开始了。选C。