The meeting yesterday is of great importance .A. being heldB. having heldC. to be heldD.

问题补充：

The meeting yesterday is of great importance .

A. being held

B. having held

C. to be held

D. held

答案：

A. being held

B. having held

C. to be held

(答案→)D. held

解析：考查过去分词做定语，因为meeting和hold是被动关系，而且是昨天已经被举行了，用过去分词作定语，句意是：昨天举行的会议很重要。A项做定语表示正在被举行的，B项不做定语，C项表示将要被举行的。选D。