问题
选择题
The people there did not allow them to set up a factory _____ pollute the water in the river.
A．not so as to
B．so as not to
C．in order to
D．so that
答案
答案：B
句意是;为了不污染水，那里的人不允许他们建工厂，so as not to do “为了不…”。选B。