【正确答案】:
EUPHORIA MEANS HAPPINESS. THE CONTEXT CLUE USED IN THE SENTENCE IS SYNONYMY/A SYNONYM.
【题目解析】:in a mood of 处于...的情绪中。后面又提到“his happiness....”他开心是因为赢得了比赛。所以可以猜测euphoria 是开心,幸福的意思。
EUPHORIA MEANS HAPPINESS. THE CONTEXT CLUE USED IN THE SENTENCE IS SYNONYMY/A SYNONYM.