大全987 -- 73 介词后面不是不能加主谓结构么？

missoffer

Alaska
regularly deposits some of its profits from the sale of oil into a special fund, with the intention to sustain the state’s economy after the exhaustion of its oil reserves.

A.fund, with the intention to sustain the state’s economy after the exhaustion of its oil reserves

B.fund, the intention of which is to sustain the state’s economy after they have exhausted their oil reserves

C.fund intended to sustain the state’s economy after oil reserves are exhausted

D.fund intended to sustain the state’s economy after exhausting its oil reserves

E.fund that they intend to sustain the state’s economy after oil reserves are exhausted

答案是C，可是介词（after）后面不是不能加主谓结构，这里C就是后面加了完整的主谓结构为什么还正确呢？
困惑好久了，求解！感谢！！

bejamin1111

after can be used both as a conj and prep.

missoffer

bejamin1111 发表于 2013-12-6 13:10
after can be used both as a conj and prep.

所以这里是做conj！ 懂了懂了 谢谢你！！！