网址:http://m.1010jiajiao.com/timu3_id_2742410[举报]
从所给的四个选项中选择最佳答案
—______ I swim in the river?
—No, you _______.There _______ be crocodiles in it.
[ ]
A.Can, mustn't, may B.Must, needn't, may
C.May, may not, can D.Need, can't, must