问题
选择题
Sometimes we _____ be busy shopping in a supermarket, for it's more convenient to purchase online nowadays. [ ]
A. needn't
B. mustn't
C. shouldn't
D. can't
答案
答案：A
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Sometimes we _____ be busy shopping in a supermarket, for it's more convenient to purchase online nowadays. [ ]
A. needn't
B. mustn't
C. shouldn't
D. can't
答案：A