请教GWD-13-11

GWD-13-11

A South American bird that forages for winged termites and other small insects while swinging upside down form the foliage of tall trees, the graveteiro belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species and that are represented in virtually every kind of habitat.

A.    graveteiro belongs to the ovenbird family, a group of New World
            tropical birds that includes more than 230 species and that are

B.    graveteiro belongs to the ovenbird family, a group of New World
            tropical birds that includes more than 230 species and  is

C.    graveteiro belongs to the ovenbird family, a group of New World
            tropical birds that include more than 230 species and  is

D.    graveteiro, which belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species and that are

E:  graveteiro, which belongs to the ovenbird family, a group of New World tropical birds that includes more than 230 species and is

答案是B

想问下这句话的结构:graveteiro belongs to the ovenbird family是A South American bird的同位语吗?A South American bird后面的that引导的部分是起到修饰作用的?然后a group of...后面的部分才是句子的主体?(因为在a south american bird...和the graveteiro...里都没有找到谓语动词)

望大牛指点!

A South American bird 和graveteiro是同位语，前面的一大堆都是修饰graveteiro的

这种用法在GAMT里很常见，慢慢就熟悉了 举个例子 A great leader who leads China to liberation,Chairman Mao also made some mistakes.