The manager,____it clear that he didn't agree with us,left the meeting room.

问题描述:

The manager,____it clear that he didn't agree with us,left the meeting room.
A having made
B making
选A
为什么?

因为 make it clear that he didn't agree with us 发生在前,left the meeting room 发生在后.
有明显前后关系,又因为后面发生的用了过去时,所以前面发生的要用过去完成时.
所以选A