—Listen! Is that Kate singing in the room?
—No. It _____ be Kate. She hasn't been back from Beijing yet.
[     ]
A. must
B. can't
C. mustn't
He _____ play the piano now, but he _____ play it one year ago.
[     ]
A. couldn't; can
B. can; couldn't
C. can; could
D. could; can
Tom's name is on the book. This book _____ Tom's.
[     ]
A. can be
B. will be
C. must be
D. there be
—Where is Kangkang?
—He is ill. He _____ at home.
[     ]
A. can be
B. may be
C. must be
D. be
—_____ you swim?
—Yes, but I'm not a good swimmer.
[     ]
A. Can
B. May
C. Need
D. Must
The yellow coat _____ be Linda's because nobody likes yellow except her. 
[     ]

A. can't
B. can
C. mustn't
D. must

—I'm a little tired. Let's go to the zoo by taxi.
—We _____ take a taxi. It's not far from here.
[     ]
A. can't 
B. mustn't
C. couldn't
D. needn't
—Is Mr Smith swimming in the pool, Harry?
—It _____ be him. I saw him go to the library just now. 
[     ]
A. may not
B. can't
C. needn't
D. mustn't
—Whose notebook is this?
—It _____ Jane's. It has her name on it.
[     ]
A. must be
B. might belong to
C. may be
D. could be
—Could you please come to the museum with me this afternoon?
—Sorry, I_____. I have to take a piano lesson at 2 p.m.
[     ]
A. couldn't
B. mustn't
C. can't
D. needn't
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