_____we swim in that river?no,you___.it's dangerous to swim therea.must,can'tb.can,may notc.may,mustn't

问题描述:

_____we swim in that river?no,you___.it's dangerous to swim there
a.must,can't
b.can,may not
c.may,mustn't

c.may,mustn't....................

是B;;;;

c 选项,我可以.吗,不行这是被禁止的.