问题
选择题
He _______ a sense of humor. This is why I don’t like being friends with him.
A．is lack of
B．is lacking in
C．lacks of
D．is lacking of
答案
答案：B
考查lack用法。Lack+of＋名词 ，前面不要冠词； Be lacking in缺乏（某种品质、特点等）,不够，lack在这里v变形为adi。选项AD结构错误，根据下文a sense of humor可知选B。