[求助]TT GWD-6-29 有关since的用法

Q29:

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.

1. because of erosion, prehistoric glacier movement, and ancient, gold-bearing riverbeds thrust to the surface by volcanic activity put gold literally within reach for
2. 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
3. owing to erosion, prehistoric glacier movement, and volcanic activity that had thrust ancient, gold-bearing riverbeds to the surface, and putting gold literally within reach of
4. since erosion, prehistoric glacier movement, and volcanic activity that thrust ancient, gold-bearing riverbeds to the surface, putting gold literally within reach for(E)
5. since erosion, prehistoric glacier movement, and ancient, gold-bearing riverbeds thrust to the surface by volcanic activity put gold literally within reach of

since后面可以直接跟名词吗?

自己顶

再顶

那么这题为什么选E捏?

because of后面接名词，而原题是－－－put----是句子，是解释第一个分句的，所以用since,D中的putting是ing形式，表示动作反复出现，不符合原题意思，排出，然后选E

不知道这样做对不对？个人觉得E相对好，但是其中的and前后不是很对称，算成efficiency的错误

那请问题目中的thrust是什么成分?

Thrust 过去分词,过去式与原型同型

本句中,过去分词作修饰.