– May I go swimming in the lake Mum?– No you . It’s too dangerous.A. mustn’tB. may notC.

问题补充：

– May I go swimming in the lake, Mum?

– No, you . It’s too dangerous.

A. mustn’t

B. may not

C. won’t

D. needn’t

答案：

(答案→)A. mustn’t

B. may not

C. won’t

D. needn’t

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