—Look! The man at the gate _______be our headmaster. He is always standing there every morning.
—No, it_______ be him. He is holding a meeting in the office now.
A. must; can’t B. must; mustn’t
C. can’t; can’t D. can’t; mustn’t
—Your watch looks so nice. It must be expensive.
—No. I ____ 20 yuan on it.
A. cost B. paid
C. took D. spent
—How long have you________?
—Since two years ago.
A. bought the camera B. been away
C. left home D. married
—Do you know whose car is it?
—It belongs to_____. It isn’t ______.
A. her, mine B. hers, mine
C. her, my D. hers, my
The Chinese mainland has become the world's second______ market for iPhone.
A. big B. bigger
C. biggest D. the biggest
Now China is fighting against illegal cooking oil（地沟油）, a kind of waste oil _____can cause a lot of illness.
A. which B. whose
C. who D. what
