We made clear when and where we going to have the meeting.
A. that; are
B. it; are
C. it; were
D. that; were
网友回答
A. that; are
B. it; are
(答案→)C. it; were
D. that; were
解析：句意：我们弄清楚了什么时间和什么地点召开会议。这里it是形式宾语，真正的宾语是后面的从句；第二空谓语动词的时态根据主句的动词来确定，主句用了过去式，宾语从句也用过去式，故选C。