被称为“黑人的故乡”的地区是 (      )

A．非洲

B．北非

C．撒哈拉以南的非洲

D．南非

— What kind of potato chips do you like?

— I like _______ ones because they are hard, dry and easily broken.[ ]

A. crispy      

B. sweet    

C. soft      

D. sour