I first began to feel sick when we went into the classroom.

问题描述:

I first began to feel sick when we went into the classroom.

我第一次感觉要吐当我们走进教室的时候。

= = 我第一次感觉到不舒服 当我走进教室的时候、

i think the last one is the most appropriate one.

当我们进入教室时,我是第一个开始感觉到难受的。

“当我走进教室时,我的第一感觉是很难受.”
sb.be the first to do sth.
才表示“某人是第一个做什么的.”所以这里不能这样翻译.
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