----- __________it be Li Ping who broke the glass?

---- No. It __________ be Wu Dong who did it.

A. Could; may     B. Can; must      C. May; must      D. Can; can

---________ it be Li Ping who broke the glass?

---No．It ________ be Wu Dong who did it．

1. A.
   Can; must
2. B.
   Must; can
3. C.
   Must; must
4. D.
   May; need

--- __________it be Li Ping who broke the glass?
--- No. It __________ be Wu Dong who did it

1. A.
   Could; may
2. B.
   Can; must
3. C.
   May; must
4. D.
   Can; can

----- __________it be Li Ping who broke the glass?

---- No. It __________ be Wu Dong who did it.

A. Could; may     B. Can; must      C. May; must      D. Can; can