While studying fix your mind on what is really important or you will remembering nothing

问题补充：

While studying, fix your mind on what is really important, or you will remembering nothing.

A. pick up

B. take up

C. bring up

D. end up

答案：

A. pick up

B. take up

C. bring up

(答案→)D. end up

解析：考查词组：A. pick up捡起，习得B. take up 从事，占据C. bring up养育， D. end up结束，句意：在学习的时候专注于重要的事情，否则最后你什么也记不住。选D。