．—What do you think made hi m so excited?
— a scholarship to Harvard, I suppose.
A. He has won
B. Winning
C. Because of winning
D. Because he has won
网友回答
A. He has won
(答案→)B. Winning
C. Because of winning
D. Because he has won
解析：考查动名词做主语，句意：什么让他这么兴奋？--我猜是获得哈佛大学的奖学金。可知回答的what的内容，就是主语，用动名词。选B。