-- That T-shirt with Yao Ming's picture on it ____ belong to David. He admires him a lot.
-- No, it _____ be his. He hates black color.
A：can; can't
B：may; needn't
C：must; mustn't
D：must, can't
-Are you tall?
- Yes, I'm tall.
— What are you doing?
— I'm _____ my English book.
