句际之间的逻辑关系完形填空中，句际之间的逻辑关系主要包括：并列关系(连接词有and, while等)；转折关系(连接词有but, however, though, whereas, nevertheless等)；因果关系(连接词有so,therefore, thus, because, for, since, as等)；让步关系(连接词有though, although, despite, in spite of等)；条件关系(连接词有if, unless, once, provided that, in case (of)等)；解释关系(连接词有i.e., that is to say, in other words等)；顺序关系(连接词有before, after, and, first, second, then, next, finally等)