—Look！The man at the gate ____ be our teacher. He is always standing there
every morning.
—No，it ________ be him. He is having a meeting in the office now.
A. must；can't B. must；mustn't
C. can't；can't D. can；can't
— ________ bookcase is this？ —It must be ________.
A. Who's；Tom B. Who's；Tom'
C. Whose；Tom's D. Whose；Tom
Nancy doesn't like doing chores. But she was made ______ the dishes yesterday.
A. wash B. to wash C. washing D. to washing
—Look at the boy with green hair. It's cool!
—But I don't think students ________ to color their hair.
A. should be not allowed
B. should be allowed
C. should allow
D. shouldn't be allowed
Jim wants to get his hair ________. It's too long.
A. cut B. cutted C. cuts D. Cutting
---Do you know second-hand smoke?
---To protect our health and memory.
A. how we should prevent B. why should we prevent
C. why we should prevent D. whether we should prevent
