5.Learning languages is a long,______ process with ______ and it is too easy just to give up.
问题描述：
5.Learning languages is a long,______ process with ______ and it is too easy just to give up.
A) gradually,ups and downs \x05B) gradually,up and down
\x05C) gradual,ups and downs \x05D) gradual,up and down
答
D
process为名词,所以前面需要一个形容词修饰,固A.B排除
up and down固定搭配,起伏不定,没有+S的形式