We shall never give up for even one day. A. studying B. studyC. to studyD. studies

问题补充：

We shall never give up for even one day.

A. studying

B. study

C. to study

D. studies

答案：

(答案→)A. studying

B. study

C. to study

D. studies

解析：我们永远不能放弃哪怕一天的学习。Give up doing sth放弃做某事，动名词表示抽象动作，结合语境可知选A。