大全211

1.        Chronic low-level leaking and the routine discharge of drilling mud and mineral salts present considerable environmental risk during offshore oil drilling.

(A) Chronic low-level leaking and the routine discharge of drilling mud and mineral salts present considerable environmental risk during offshore oil drilling.

(B) The reason offshore oil drilling presents a considerably environmental risk is because of chronic low-level leaking and the routine discharge of drilling mud and mineral salts.

(C) A considerable risk to the environment is presented during offshore oil drilling, where low-level leaks are chronic and the routine discharge of mud and mineral salts.

(D) Offshore oil drilling presents a considerable risk to the environment due to the fact of chronic low-level leaks, and mud and mineral salts are routinely discharged.（A）

(E) Chronic low-level leaking, along with the routine discharge of drilling mud and mineral salts, are what make offshore oil drilling environmentally risky.

risk是可数名词，应加a 吧,所以A选项不对吧。我选B。

我也选的是B.可是大全解释上说reason和because of 重复,但是他的解释没有说服力。我见过这种用法啊.for example:

The reason why I am late is because I missed the bus.

不知道有没有别人有同样的疑问。

risk 是不可数的

because of 后面跟着是名词,所以如果前面有reason,because of应该省略

和你上面的because从句是两回事

RISK 是单数是GMAT考试里的规定吗? 在任何字典里都有RISK做复数的例子啊.

正因为BECAUSE OF 是介词,所以后面才不跟句子.

以下是引用xiao_zhutou在2005-6-12 3:21:00的发言：
What's wrong with E?

主语是leaking, 后面的along with...是作状语吧？我想。

The reason ...... is because of ......好像看上去不太合理,