-Do you take exercise every day?-Yes.I always ________thirty minutes walking after supper.
A. spend
B. cost
C. take
D. pay
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-Look! There is a horse racing program on TV now.-Hmm...It ________exciting.
A. seems
B. looks like
C. feels
D. seems like
-Who's singing in the next room? Is it Lucy?-It________be her.She has gone to New York.
A. can't
B. must
C. shouldn't
D. can
-Must I go through the radiation (辐射) check when I come back from Japan at the airport these days?-Yes,you ________.
A. can
B. may
C. might
D. must
-________We clean the classroom at once?-No,you ________.You ________clean it after school.
A. Must;needn't;may
B. Must;mustn't;can
C. Shall;can't;must
D. Need;mustn't;may