we must buy things we ( )A.need not B.do not need C.have not

问题描述:

we must buy things we ( )A.need not B.do not need C.have not

语法上说是选 B
need 在这里是行为动词,所以要用do这个助动词对全句进行否定.
但是意思上好像不太对,“我们必须买我们不需要的东西”,逻辑上怪怪的~