扫描二维码，直接登录
题库 / Prep2007E1-SC-75
Beneath the soil of the Malheur National Forest in eastern Oregon, a fungus has for centuries been slowly weaving its way through the roots of trees, to become the largest living single organism known to humans.
has for centuries been slowly weaving its way through the roots of trees, to become
has slowly woven its way through the roots of trees for centuries, and so becoming
that has been slowly weaving its way through the roots of trees for centuries has become
that has for centuries slowly woven its way through the roots of trees and has become
that, having slowly woven its way through the roots of trees for centuries, to become
还没有题目讲解（毕出老师会陆续发布对官方考题的解读，请保持关注）。
并不是并列的关系，而是有因果的递进
登录 或 注册 后可以参加讨论