A gentleman ___ his hat and hold it in his hand when a lady enters the elevator.
A. Should put on
B. should to take off
C. should take off
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The reason why he ___ to the meeting is that he is a senator.
A. ought
B. ought go
C. ought to go
Dave loves chocolate, but he ___ too much or he will get fat.
A. Should eat not
B. shouldn’t eat
C. should eat
“I think that the grade my teacher gave me on my test is wrong.”“Really? You ___ to her after class today.”
A. oughtto talk
B. shouldto talk
“Mom, I don’t want to clean my room. ___ do it right now?”“Yes, right now.”
A. must I
B. have I
C. Do I have to