问题描述：
She was the first woman ___to shuch a post.
A.electing
B.to have elected
C.being elected
D.to have been elected
这题我不太懂,为什么选D?to是怎么来的?为什么是完成式?
A.electing
B.to have elected
C.being elected
D.to have been elected
这题我不太懂,为什么选D?to是怎么来的?为什么是完成式?
问题解答：
我来补答展开全文阅读