单选题 Double Eagle II, the first trans-Atlantic balloon, was greeted by {{U}}avid{{/U}} crowds in France.
【正确答案】 A
【答案解析】[分析] 形容词辨析。 A.eager热心于,渴望着;B.surging急剧上升,冲击,波动; C.appreciative欣赏的,有欣赏力的,表示感激的:D.vigorous精力旺盛的,健壮的;而avid表示“渴望的”,因此A是答案。