what ___ great progress he has made!A.a B.不填 该选哪

问题描述:

what ___ great progress he has made!A.a B.不填 该选哪
what ___ great progress he has made!A.a B.不填
该选哪一个?为什么?
是不是有一个叫做make a great progress的短语?

A是不是固定搭配啊嗯嗯