What do you think made Mary so happy?_____ a prize in the recent competition A.AS she won B.Won

问题描述:

What do you think made Mary so happy?_____ a prize in the recent competition A.AS she won B.Won
C.Wining D.Because of wining

c
我觉得
句子还原
-----------made Mary so happy 就是 差个 主语吧