Don't miss the meeting. The questions to be discussed at it of great importance.A. isB. a

问题补充：

Don miss the meeting. The questions to be discussed at it of great importance.

A. is

B. are

C. was

D. will

答案：

A. is

(答案→)B. are

C. was

D. will

解析：it指the meeting,主语是The questions.