Autumn is a busy season.peasants are busy getting in the cro

peasants相当于 a peasant,表示“农民”这一类人,不必加the.
eg:A dog is a faithful animal.
Dogs are faithful animals.
而crops 必须与the连用,才能表示“农作物 ”整个群体.
eg:They are the teachers of this school.指全体教师)
They are teachers of this school.(指部分教师)
这句话暗含的意思就是,农民忙于收获全部的农作物,而不是部分种类.

我在成考上也碰到差不多的题目。
autumn is a busy season. the farmers work hard to get the crops in.