急求解一道语法题，关于倒装

凌晨果果

Q29:
Antarctica receives more solar radiation than does any other place on Earth, yet the temperatures are so cold and the ice cap is reflective, so that little polar ice melts during the summer; otherwise, the water levels of the oceans would rise 250 feet and engulf most of the world’s great cities.

1. is reflective, so that little polar ice melts during the summer; otherwise,
   
2. is so reflective that little of the polar ice melts during the summer; were it to do so,
   
3. so reflective that little polar ice melts during the summer, or else
   
4. reflective, so that little of the polar ice melts during the summer, or
   
5. reflects so that little of the polar ice melts during the summer; if it did
   答案选B，why?B是倒装吗？so 引导的？were 是怎么回事？省略了什么吗？
   

zhao9171000

我也看到这题了，就看出是平行，就选了。。不过后面倒装是虚拟语气啊

凌晨果果

我也看到这题了，就看出是平行，就选了。。不过后面倒装是虚拟语气啊

-- by 会员 zhao9171000 (2010/9/23 15:26:24)

虚拟语气，would 不省略吗？

zhao9171000

我也看到这题了，就看出是平行，就选了。。不过后面倒装是虚拟语气啊

-- by 会员 zhao9171000 (2010/9/23 15:26:24)

虚拟语气，would 不省略吗？

-- by 会员 凌晨果果 (2010/9/23 16:38:19)

不省略