21. The first question we now discuss is _______ early tomorrow.A) whether B) where C) what D) whom 为何选A

the first The first first of all first the first at first的区别 the first of the first of all,first,at first,for the first time,the first time有什么区别 英语翻译 in the first. win the first for the very first in the first place the first time 造句 at the first crossing 例如The first four take the first for the first time. the first three the first thing April the first翻译 in the first half