请教大家

1，That the new managing editor rose from the publication's ''soft'' news sections to a leadership position is more of a landmark in the industry than ____________her being a woman.（e）

a.her being a woman

b.beng a woman is

c.her womanhood

d.that she was a woman

e,that she is a woman

MORE后是OF A LANDMARK。。。THAN后为什么是从句，按照平衡的原则OF 后也不是句子，该如何解释？

2，People ---have discovered the principles of solar energy whenever fuel becomes scarce and expensive but wil forget them every lime a new source of cheap energy is developed.

这句话好费解，请帮我翻译一下

谢谢大家

1. That is more of a landmark than that she is a woman.

2. People have discovery the principles of solar energy whenever fule becomes scarce and expensive. +

But, people will forget them every lime a new source of cheap energy is developed.