White White is the color of purity.It is--to be a summer color.However,the ----of it is that it is very difficult to kee

问题描述:

White White is the color of purity.It is--to be a summer color.However,the ----of it is that it is very difficult to keep clean.
A.said B.reported C.thought D.believed
A.quality B.truth C.advantage D.disadvantage
为什么答案是C和D呢?

C
D