请教一道题~~~ sc

zx1988626

There are hopeful signs that we are shifting away from our heavy reliance on fossil fuels:  more than ten times as much energy is generated through wind power now than it was in 1990.

	generated through wind power now than it was
	generated through wind power now as it was
	generated through wind power now as was the case
	now generated through wind power as it was 这题bc怎么选啊~~怎么想不通~~~
	now generated through wind power than was the case

对不起 发错区了 怎么删帖啊？