The saying “ Brother is smoking is not a cigarette(香烟), but loneliness.” is popular on the Internet.
A. That
B. What
C. Whether
D. Which
网友回答
A. That
(答案→)B. What
C. Whether
D. Which
解析：这题考的是主语从句， Brother is smoking就是主语从句，主语从句中缺少主语，句意是：哥抽的不是香烟是寂寞。选B。