第19题: [单项选择]When the author uses the phrase "eager to mix socially", he means______. A. ready to be helpful and friendly to others B. eager to take part in social activities C. wanting very much to enjoy social life D. willing to improve bad social conditions 参考答案:A 答案解析:词汇语义题。根据eager to mix socially的上下文:Since the opposite of shy is friendly,or eager to mix socially,可知e