You can’t build a solid house on a foundation of debris, and ___________________________ (同理，你的成功亦是如此).

A．you should find a orchard with enough apples
B．the more you change, the more chances you will get
C．you can pick more apples because of your luck
D．you should try harder to find apples in the places you’ve visited before

A．Typing.
B．Drawing a picture.
C．Doing exercise.
D．Playing the piano.