Life for us is exercise in making different choices and can never come toend until the end

问题补充：

Life for us is exercise in making different choices and can never come

toend until the end of life itself.

A. /; /

B. /; an

C. an;/

D. an;an

答案：

A. /; /

B. /; an

C. an;/

(答案→)D. an;an

解析：第一空泛指“一次演练”；第二空考查短语中的冠词，此处come to an end意为：结束，到尽头。句意：生活对我们来说，就像做出一次不同选择的演练一样，我们无法到达尽头直到生命的终结。根据句意选D。