eager前不用a而是an。因为eager是以元音开头的单词，所以用an。eager中文意思是adj. 热切的，渴望的，渴求的

The company is an eager one to gain a foothold in Europe.这家公司急于在欧洲取得一席之地。

He was as eager as his Captain to beat the record.他和他的队长一样渴望打破纪录。