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

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
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

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
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

C
process为名词，所以前面需要一个形容词修饰，固排除A、B
with是介词，后面应当接名词，所以将up and down临时活用为ups and downs。
参考译文：语言学习是一个漫长的、渐进的过程，期间会有起有落，而且很容易放弃。