People along the river didn’t allow them to a factory so as not to pollute the water.A. s

问题补充：

People along the river didn’t allow them to a factory so as not to pollute the water.

A. set up

B. give up

C. take up

D. look up

答案：

(答案→)A. set up

B. give up

C. take up

D. look up

解析：句意：河边的人们为了不污染河水不允许他们在这建工厂。set up 建立；give up放弃；take up拿起，从事；look up 查阅，查找。根据句意选A。