问题补充：
The managers, it clear to us that he didn’t agree with us, left the meeting room.
A. who has made
B. having made
C. made
D. making
答案：
A. who has made
(答案→)B. having made
C. made
D. making
解析：本题考查非谓语的用法。由于make动作与manager之间是主动关系，而且发生在left动作之前，故要用现在分词的完成式；如看作是定语从句,则从句中的谓语动词应该用过去完成时“had made”.
