What's that __was flashed in the sky just now?A which B that C who D as 为什么选A?

问题描述:

What's that __was flashed in the sky just now?A which B that C who D as 为什么选A?

前面已经有that所以不可能是B.是东西在闪,而who是指代人,所以C不选.而as表什么什么的原因不合题意.所以选A