问题
选择题
Very loud noises _____ make people ill. So we _____ make great noise. [ ]
A. must; mustn't
B. need; needn't
C. can; mustn't
D. must; can't
答案
答案：C
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Very loud noises _____ make people ill. So we _____ make great noise. [ ]
A. must; mustn't
B. need; needn't
C. can; mustn't
D. must; can't
答案：C