a.

1. 興奮的；激動的[（+about/at/over）][+to-v]
   She was excited to learn the news.

   她聽到這消息很興奮。

   She is very excited about winning the first prize.

   贏得首獎，她激動不已。

   The excited children were opening their Christmas presents.

   興奮的孩子們在打開他們的耶誕禮物。

2. 活躍的
   the excited buying and selling of stocks

   活躍的股票買賣

1. excite的動詞過去式、過去分詞