John won a gold medal in the English petition really excited his family.
A. That
B. when
C. which
D. what
网友回答
(答案→)A. That
B. when
C. which
D. what
解析：考查主语从句。本题中的that引导主语从句that John won a gold medal in the English petition.在句中that不充当任何成分，只起引导和连接作用。句意：John在英语比赛中赢得了金牌这件事情让他的家人很高兴。BC两项都有疑问的意思，what要在句中充当一定的句子成分。故A正确。