TPO22流星那篇句子简化题请教！！

无敌浩克OneUID: 3605802

When broken open, Allende stones are revealed to contain an assortment of small, distinctive objects, spherical or irregular in shape and embedded in a dark gray matrix (binding material), which were once constituents of the solar nebula—the interstellar cloud of gas and dust out of which our solar system was formed.

Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information.
A Allende meteorites were formed when constituents of the interstellar cloud of gas and dust got trapped inside small, roughly spherical objects and these objects became bound together in a dark gray matrix.
B Inside Allende meteorites is a dark gray matrix that binds together small spherical or irregular objects formed from the interstellar cloud of gas and dust out of which the solar system was made.
C By breaking open Allende meteorites, scientists were able to find out what the solar nebula was made of.
D Allende meteorites were filled with material formed almost entirelyfrom interstellar gas and dust.

答案选B
我不理解的是：which were once constituents of the solar nebula—the interstellar cloud of gas and dust out of which our solar system was formed.这个从句修饰的是谁？

感觉4个选项都不正确啊T_T

谢谢大家~~

gterlannUID: 3595027

which were,LZ想想,这个which前面哪个被which指代之后能用复数呢?

这种陷阱其实ETS题目里比较常见的,单复数和人称时态这些来追溯指代源;

无敌浩克OneUID: 3605802

gterlann 发表于 2015-11-10 23:05
which were,LZ想想,这个which前面哪个被which指代之后能用复数呢?

这种陷阱其实ETS题目里比较常见的,单复 ...

呀呀呀，明白了！感谢！！！！！

syiqc808UID: 2798596

distinctive objects, spherical or irregular in shape and embedded in a dark gray matrix (binding material), which were once

另外which were 前面有个逗号，和前面的内容一起修饰 distinctive objects，如果修饰matrix就直接跟着

孔丽云UID: 3591508

楼主，TPO22阅读第一篇第三题求教，为什么是D啊，本渣当时毫不犹豫选了C。。。

孔丽云UID: 3591508

Numerous insects occupy the marsh, feeding on living or dead cordgrass tissue, and redwing blackbirds, sparrows, rodents, rabbits, and deer feed directly on the cordgrass.

不就说这些虫子在这里生活完了吃吃草什么的，鸟啊动物啊就吃草吗

iSNSDUID: 3719887

孔丽云 发表于 2015-12-28 20:45
Numerous insects occupy the marsh, feeding on living or dead cordgrass tissue, and redwing blackbird ...

insectss是住在marsh里面的啊，不是住在这个草上的