—Listen! Is that Pingping playing the guitar? 

       —No. It __________be Pingping. He has gone to Beijing.

     A. mustn’t            B. may              C. can’t               D. must

—Listen! Is that Pingping playing the guitar? 

—No. It __________be Pingping. He has gone to Beijing.

1. A.
   mustn’t
2. B.
   may
3. C.
   can’t
4. D.
   must

 - Listen! Is that Pingping playing the guitar?

   - No. It ________be Pingping. He has gone to Beijing.

   A. mustn’t               B. may                  C. can’t                 D. must

—Listen! Is that Pingping playing the guitar? 
—No. It __________be Pingping. He has gone to Beijing.