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.
is reflective, so that little polar ice melts during the summer; otherwise,
is so reflective that little of the polar ice melts during the summer; were it to do so,
so reflective that little polar ice melts during the summer, or else
reflective, so that little of the polar ice melts during the summer, or
reflects so that little of the polar ice melts during the summer; if it did
C选项：is是不是不能省略？因为and前的并列成分用的动词时are?
or else是不是不够地道？
本题正确答案是B
首先，省略的想法，是因为看了这道题：
So dogged were Frances Perkins' investigations of the garment industry, and her lobbying for wage and hour reform was persistent, Alfred E. Smith and Franklin D. Roosevelt recruited Perkins to work within the government, rather than as a social worker.
A.and her lobbying for wage and hour reform was persistent,
B.and lobbying for wage and hour reform was persistent, so that
C.her lobbying for wage and hour reform persistent, that
D.lobbying for wage and hour reform was so persistent,(E)
E.so persistent her lobbying for wage and hour reform, that
