As sources of electrical power, windmills now account for only about 2,500 megawatts nationwide, but production is almost expected to double by the end of the year, which would provide enough electricity for 1.3 million households.

1. almost expected to double by the end of the year, which would provide

2. almost expected that it will double by the end of the year, thus providing

3. expected that it will almost double by the end of the year to provide

4. expected almost to double by the end of the year and thus to provide

5. expected almost to double by the end of the year, which would thus be providing

答案选D，个人觉得B也没什么错，providing做结果状语意思也通呀？

望NN指点

B 中 providing 的结果状语是主句windmills now account for only

about 2,500 megawatts nationwide 的， 还是 but 后面句子的 production

is almost expected that it will double by the end of the year 的？ 容

易有歧义。。

B的问题：

almost位置不对，almost应该修饰double而不是expect

it will不对，it就是production这里再用个代词是累赘

主要还是看平行

GMAC就好这口子

to double / to provide