加标点。
□你为什么要这样做呢□教育家又问□
“？”。
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
没有了（）计算机系统就启动不起来了。
A.编译器
B.DBMS
C.OS
D.浏览器
