Whoever comes back first is supposed to win the prize.
问题描述：
Whoever comes back first is supposed to win the prize.
(Whoever,No matter who) comes back first is supposed to win the prize.为什么不能选No matter who
答
no matter who 就变带有你不管是谁comes back first...
whoever 就是你知道有一个人会先回来,
其实大意并没有太多的区别,但是通常见到的说法还是前者.
如果你说后者的话,人家可以懂但会知道你对惯用的词不熟.