两道精简过的大全题，马上考试了求助

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

c fund intended to sustain the state's ecomomy after oil reserves are exhausted

d fund intended to sustain the state's ecomomy after exhausting its oil reserves

答案是c，我选的是d ，为什么错呢，急问

in the 1980's the rate of increase of the minority population of the united states was nearly twice as fast as the 1970's

a

b twice as fast as it was in

c twice what it was in

答案是c 我选的b，为什么呢

第一题注意，after+doing错

第二题，　我觉得rate不能是fast,应该直接和１９７０的比较

1. 如果是D, exhausting的逻辑主语是谁? 成了fund了,对不对?而意思上来说,是希望the state

2. 如楼上所说, rate是不能fast的