一道prep语法题

wenyiwendy

The 151 government members of World Bank are expected to increase the banks' funding by $75 billion, though some United States legislators cite an obstacle to congressional passage being the concern that the bank's loan will help foreign producers compete with American businesses.(C) as an obstacle to congressional passage the concern
(D) the concern, an obstacle to congressional passage,
正确选项是C，sadly，我选的是D，以为“ an obstacle to congressional passage”可以作concern的同位语。
可以帮我解释一下结构么？很惭愧的说，句子没有完全读懂。。。
谢谢

nemiah

D的意思是obstacle等同于concern的内容，而原意是that从句是concern的内容，而cite a concern 将成为obstacle.二者意思不同

wenyiwendy

貌似有个说法是同位语的先行词和同位语从句不可以被隔开。。。我也不确定。。。

nemiah

但d选项语法上有错吗?应该是意思有误吧?

wenyiwendy

干练，精辟，一针见血！thx

dzxu

此句确实比较复杂，因为语序变动了。

比较容易懂的语序应该是：
The 151 government members of World Bank are expected to increase the banks' funding by $75 billion, though some United States legislators cite the concern that the bank's loan will help foreign producers compete with American businesses as an obstacle to congressional passage.

thoug后的结构是：cite the concern as

concern又跟了一个that引导的同位语从句来说明concern的内容。从句较长，放到后面去了。