They talked in a low vioce___heard by the man standing against the wall.
问题描述：
They talked in a low vioce___heard by the man standing against the wall.
A.so as to not be B.as to be not C.so not as to be D.so as not to be 选什么呢
答
D.so as not to be 不定式作目的状语,意为"为了不让"
句意:为了不让靠墙站着的那个人听见,他们小声交谈.