问题补充:
--What do you think has made Tom so excited?
-- a prize in a lottery.
A. Winning
B. Won
C. He won
D. To win
答案:
(答案→)A. Winning
B. Won
C. He won
D. To win
解析:本题考查非谓语动词。根据问句What do you think has made Tom so excited?回答应当为Winning a prize in a lottery has made Tom so excited.故动名词短语作主语,选A。