A:So you did
B:So I did
C:So did you
D:So did I
“自从贵主和亲后,一半胡风似汉家,”是唐朝《陇西行》的一句诗,它反映了当时的汉藏关系,对诗句的理解符合事实的是( )
Here is a book, but it isn't _________.