一道英语题 _______ get the news, you must let me know.

问题描述:

一道英语题 _______ get the news, you must let me know.
27. _______ get the news, you must let me know.
A. Whenever you'llB. When you'll
C. No matter when you'llD. No matter when you
答案A
为什么不能用C

选D.no matter when=whenever意为"无论何时",引导的是时间状语从句.所以要用一般现在时.
正确答案不会是A,A和C意义相同.