扫描二维码，直接登录
题库 / GmatLaCourse-SC-40
The monarch is the only butterfly that migrates south in the fall and north in the spring, although the species needs such a long trip to evolve.
although the species needs such a long trip to evolve
because the species needs such a long trip to evolve
略
略
略
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）。