5. 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
1. with the intention of doing sth, intend to do sth是习惯用法,A错
2. 代词指代,B/E中的they/their只能指代前面profit, B和D错
3. 逻辑主语判断:介词+ing分词在句首,逻辑主语等于主句主语;在句尾逻辑主语可能是主句主语,也可能是所修饰动词的逻辑主语。D中after exhausing sth,在句尾作状语就近修饰sustain,逻辑主语为sustain的逻辑主语fund. the fund exhausts its oil reserves逻辑意思不合理。