Complete each of the following sentences with a (compound) word derived from the one(s) given in brackets.
The chief functions of live are to help the body digest and use food and to help （ ）the blood of wastes and poisons. ( pure )
【正确答案】：PURIFY
【题目解析】：
生物的主要功能是帮助身体消化和使用食物，帮助净化血液的废物和毒物。purify净化。