They had no food__water.A and B or C as well as D as well

问题描述:

They had no food__water.A and B or C as well as D as well
这题为什么要选or不可以是and吗?

因为是否定句had no,不选and.and一般用于肯定句,在否定句中用or来表示并且的意思.