With their new lock， you __________ search for keys in your bag any more． Isn't it cool？（ ）
A．needn'tB．can'tC．mustn'tD．shouldn't
With their new lock， you __________ search for keys in your bag any more． Isn't it cool？（ ）
A．needn'tB．can'tC．mustn'tD．shouldn't
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