GWD7-18

Q18:

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

   Answer: B

我选了A，因为觉得so that是说因为 temperatures are so cold and the ice cap is reflective这两项

而B中的so that我觉得改变句子原意了呢....A错在什么地方了？请哪位大侠指点一下...

A不简洁，B表意准确而且简洁，结构也合理

这道题我能理解了,但是我感觉虚拟的部分,E应该更好一些，因为B中be to do的结构太主观了吧？