____ leaves the room last must turn off the lights.A. Anyone B. Who C. No matter who D. WhoeverWhy D? not C?

____ leaves the room last must turn off the lights.A. Anyone B. Who C. No matter who D. WhoeverWhy D? not C?
____ leaves the room last must turn off the lights.
A. Anyone B. Who C. No matter who D. Whoever
Why D? not C?

____ leaves the room last must turn off the lights.A. Anyone B. Who C. No matter who D. WhoeverWhy D? not C?
No matter who是用来引导壮语从句的,意思为 “无论谁...”.而此处是需要填一个能够当主语以及主语从句引导词的疑问词,因此只能选D了.
其实平心而论,这句话最好的表达应该是：
Anyone who leaves the room last must turn off the lights.
可惜没有这个选项.