-What should we do to prevent the flu? -I think we ______ keep away from crowed places.
A. shouldn’t
B. should
C. must
D. had better not
-I have a stomachache. What should I do? -You _______ drink cold water and _______ eat too much.
A. had better not; shouldn’t
B. should; had better
C. had better; had better
D. shouldn’t; should
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