— What’s the main purpose of tonight’s meeting?

— We are going to talk about the problem _______ at the last meeting.

A. having discussed       B. to be discussed   C. being discussed         D. discussed

---What’s the main purpose of tonight’s meeting?

---We are going to talk about the problem ______ at the last meeting.

1. A.
   having discussed
2. B.
   to be discussed
3. C.
   being discussed
4. D.
   discussed

— What’s the main purpose of tonight’s meeting?
— We are going to talk about the problem _______ at the last meeting

1. A.
   having discussed
2. B.
   to be discussed
3. C.
   being discussed
4. D.
   discussed

— What’s the main purpose of tonight’s meeting?

— We are going to talk about the problem _______ at the last meeting.

A. having discussed       B. to be discussed   C. being discussed         D. discussed

—What’s the main purpose of tonight’s meeting?

—We are going to talk about the problem ____ at the last meeting．

A．discussed                                            B．discussing

C．being discussed                                          D．having discussed