答案：D

题目分析：考查固定词组，A. took up拿起B. built up增进D. set up建造，句子意思“他们集资了许多钱为山区的孩子们建造学校”

点评：本题考查了up组成的动词短语的辨析，英语中有的词组是不同的动词搭配相同的副词或介词构成的。含义不一样，注意区分

即学即练：I was about to walk over to Tom's seat when he ______ and left.

A. set up               B. got up           C. put up           D. came up

选B