【单选题】Meanwhile, I always kept in touch with my former professor at college.
D.
exchanged letters with
【单选题】()是政府的重要特征,也是政府体现国家意志、维护国家主权、实现自身职能的保证。
【多选题】环境与资源保护法区别于一般法律的主要特征是( )。
【单选题】Meanwhile, I always kept in touch with my former professor at college, by letter and telephone.
D.
exchanged letters with