----What do you think has made Tom feel down?
---- his seat in the election, I think.
A. As he lost
B. Losing
C. Because of
D. Lost
网友回答
A. As he lost
(答案→)B. Losing
C. Because of
D. Lost
解析：考查动名词用法。句意：—你认为是什么让Tom感觉很不好？—我认为是在选举中失去了他的职位。本题中所选的词必须能代替what做句子的主语。ACD三项都不能在句中做主语，只有动名词短语doing sth可以在句中做主语。故B正确。