—How far is it from this hotel to _______ station?

—It is _______ eleven-kilometer walk from here.

A．the; an

B．/; an

C．/; /

D．the; a

家禽、家畜的祖先都曾是野生种类，而最终被人驯养成功的原因是       　　[ ]

A．自然选择     

B．人工选择     

C．自然演化     

D．优胜劣汰