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11. Jessica hasn't made up her mind about where to go to school. She
She just doesn't know yet
A. mostn't
B. may not
12. This box isn't as beavy as it looks. You
A. must
B. mustn't
13. Yesterday everyone in the office
14. You
A. mustn't
15. You
attend Duke University
C. needn't
D. can't
help me with it. Thanks anyway for offering to
B. might
play load music at night. The neighbors will call the police.
A. couldn't
C.might
D. needn't
leave the building for a fire drill. I am glad it wasn't a real
B. musta't
B. needn't
C. might not
stand up. There are a lot of seats available on the bus.
C. needst
clean up after themselves
C.ought
better return it today.
C.might
16. People who use public parks
A. must
17. This library book is overdue. I
A need
B.
must
18. Our company provides free advice on the use of our products. You
B. br
Am
S
D.mustn't
D. couldn't
D. might not
D. might
D. had
pay us
D.m