VOA慢速英语:How High Will the Price of Oil Go This Time?

1.But the rebellion against Libyan leader Moammar Gadhafi has reduced production, affecting the global market.

affecting现在分词作结果状语。

而引导结果状语从句的是so… that 或 such…that比较： so和 such 其规律由so与such的不同词性决定。such 是形容词，修饰名词或名词词组，so 是副词，只能修饰形容词或副词。 so 还可与表示数量的形容词many, few, much, little连用，形成固定搭配。 　　so foolish such a fool 　　so nice a flower such a nice flower 　　so many / few flowers such nice flowers 　　so much / little money. such rapid progress 　　so many people such a lot of people 　　（ so many 已成固定搭配，a lot of 虽相当于 many，但 a lot of 为名词性的，只能用such搭配。） 　　so…that与 such…that之间的转换既为 so与such之间的转换。 　　The boy is so young that he can't go to school. 　　He is such a young boy that he can't go to school

2.This month, oil prices rose above one hundred dollars a barrel.

above，on，over
这些前置词均含“在……上”之意。
above一般指位置高于某物，但不一定在正上方，也不接触另一物，其反义词是below。
on指与另一物表面相接触。
over指一物在另一物的垂直上方，多暗示悬空，但也含“覆盖于……之上”之意。其反义词是under。

3.With gasoline prices higher, certain people might want to get a much more fuel-efficient vehicle and I don't mean even a hybrid or an electric vehicle which they could do, but the gasoline vehicles get twenty-five, thirty percent better mileage today than they did three or four years ago.

not but，不是，而是，前后两个并列的成分，表示选择。

包含not,but的另外一个用法：

It's not that..., but...
不是因为······而是因为······

用法透视
这是一个对称句型，表示"不是因为......而是因为......"才干什么。

支持范例

It's not that I don't like the car, but I think it is too expensive.
不是我不喜欢这辆车，而是它太贵了。

It's not that I am unwilling to help you, but I'm tied up with extra work these days.
不是我不愿意帮你，而是因为这段时间我工作太忙了。

It's not that he doesn't need your help, but he thinks it will be an inconvenience to you.
不是他不需要你帮忙，而是他怕给你带来麻烦。