A donkey may permit himself to fall under his burden, but not a human being, the best of creation.
A.Unlike a donkey, a human being, the highest animal form never lets himself fall because of hard work.
B.Unlike a human being full of creativity, a donkey could do nothing but become a burden to others.
C.It is impossible for a donkey to go under the control of a human being.
D.clever human being would not allow a donkey to give up working.
正确答案是A