求助：GWD25-41--请帮帮忙！

ritazai

GWD25-41

Prospecting for gold during the California gold rush was a relatively

easy task, because of erosion, prehistoric glacier movement, and

ancient, gold-bearing riverbeds thrust to the surface by volcanic

activity put gold literally within reach for anybody with a pan or shovel.

A.       because of erosion, prehistoric glacier movement,

and ancient, gold-bearing riverbeds thrust to the surface by volcanic activity

put gold literally within reach for

B.       because of erosion, prehistoric glacier movement, and volcanic

activity that thrust ancient, gold-bearing riverbeds to the surface,

and putting gold literally within reach of

C.       owing to erosion, prehistoric glacier movement, and volcanic activ-

ity that had thrust ancient, gold-bearing riverbeds to the surface,

and putting gold literally within reach of

D.       since erosion, prehistoric glacier movement, and volcanic activity

that thrust ancient, gold-bearing riverbeds to the surface, putting

gold literally within reach for

E.        since erosion, prehistoric glacier movement, and ancient, gold-

bearing riverbeds thrust to the surface by volcanic activity put gold literally within reach of

为什么要选E？我觉得D更好，因为volcanic activity是thrust ancient, gold-bearing riverbeds to the surface的主动者，D的表达应该合情理啊。而且D里面的 erosion, prehistoric glacier movement, and volcanic activity是一连串的动作啊，又导致了putting后面产生的结果。E好像就没有这种连贯性哦。大家觉得怎样？有那位好心人帮忙解释一下E？谢谢！

BOASU

划线部分是要完成一个由since引导的原因状语从句．而D项没有谓语动词.故错．

ritazai

哦，原来这样，明白了，谢谢！