--May I swim in the lake, mum? --No, you_______. Look! Here is a notice “No Swimming!”
| A．mightn’t | B．mustn’t |
| C．needn’t | D．may not |
--May I swim in the lake, mum? --No, you_______. Look! Here is a notice “No Swimming!”
| A．mightn’t | B．mustn’t |
| C．needn’t | D．may not |
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