—Is that your teacher? —That_____be Mr.W
问题:
—Is that your teacher?
—That_____be Mr.Wang. He has gone to Japan with his wife.[ ]
A. can't
B. mustn't
C. may not
—Is that your teacher?
—That_____be Mr.Wang. He has gone to Japan with his wife.[ ]
A. can't
B. mustn't
C. may not