---Who is the man over there? Is it Mr Li?

---No, it ______ be him. Mr Li is much taller.

1. A.
   mustn't
2. B.
   may not
3. C.
   can't
4. D.
   needn't

—Who is the man over there? Is it Mr. Li?

—No, it________ be him. Mr. Li is much taller.

　　 A. mustn’t 　　　　　　　 B. may not 　　　　　 C. can’t 　　　　　　　 D. needn’t