Mr. Smith doesn’t believe that his daughter can work out the problem that easily,_____?

A．does he

B．can she

C．doesn’t he

D．can’t she

下列属于季风区与非季风区，内、外流区域分界线的山脉是（　　）

A．大兴安岭和太行山

B．祁连山和横断山脉

C．秦岭和昆仑山

D．阴山和贺兰山