The message you intend to convey through words may be the exact opposite of others actually understand.
A. why
B. that
C. which
D. what
网友回答
A. why
B. that
C. which
(答案→)D. what
解析： 考查宾语从句。介词of之后跟宾从，且宾从 others actually understand中缺少understand的宾语，所以选D。