[問題]天山4-Q41

[joni]

[Q41]
Antractica receives more solar radiation than does any other place on Earth, yet the temperatures are so cold and the ice cap [url]is reflective, so that little polar ice melts during the summer; otherwise[/url], the water levels of the oceans would rise 250 feet and engulf most of the world's great cities.

A.is reflective, so that little polar ice melts during the summer; otherwise,
B. is so reflective that little of the polar ice melts during the summer; were it to do so,

Ans: B
為何A錯? 另外請教"were it to do so"之意與用法?

謝謝大大回覆~

[Penny Lee]

so adj./adv. that 是慣用語

were it to do so = if it were to do so

[hwatai]

剛好看到相關資料，分享一下：

=== so的用法 ===

so 可以作為代替語(pro-form)，代替前面已提過的adj或adv

例：The use of pesticides is as extensive as it was ten years age, if not more so. (so = expensive)

例：He often behaved prudently but he did not always behave so. (so = prudently)

例：There is substantial evidence that certain forms of solar energy either are now economically competitive with
conventional sources of heat and power or will be so within a few years. (so = economically competitive)

＝＝＝＝＝＝

本題的do=melt, so=during the summer

歡迎討論

[joni]

暸解了,感謝兩位大大賜教^0^