词汇运用 （a） 根据句意和汉语注释，写出单词的正确形式。（b）根据句意, 写出括号内所给单词的适当形式。

诗歌鉴赏
                                                                                             宿桐庐江寄广陵旧游①
                                                                                                        孟浩然
                                                                                          山暝听猿愁，沧江急夜流。
                                                                                          风鸣两岸叶，月照一孤舟。
                                                                                          建德②非吾土，维扬③忆旧游。
                                                                                          还将两行泪，遥寄海西头④。
注释：①旧游：指故交。②建德：今浙江省建德县一带。③维扬：即扬州。④海西头：指扬州。

直线$\left(a+1\right)x+\left(a-1\right)y+2a=0\left(a\in R\right)$与圆$x^2+y^2-2x+2y-7=0$的位置关系是（   ）