5. This dance step is quite easy to learn.
学这个舞步挺容易的。
还能这样说：
It's very easy to learn this dance step.
Learning this dance step is quite easy.
应用解析：
one-step 单步舞;
two-step 拍圆舞;
guide sb.'s steps 引导某人;
in steps 逐步地;
false step 失算;绊倒
6. My Chinese dance and Latin dance are very good.
我的中国舞和拉丁舞都跳得很好。
还能这样说：
I can dance Chinese dance and Latin dance well.
Both my Chinese dance and Latin dance are quite good.
谚语：
A fox may grow pray, but never good.
江山易改，本性难移。
7. I think I'll sit out the next dance.
我想坐一会儿，等过了下支舞再跳。
还能这样说：
I want to have a rest to sit here. And I will dance after I appreciate the following dance.
Sorry, I'm tired now and I want to have a short rest.
应用解析：
sit on one's hands 什么都不干;
sitting pretty 处境幸运;
sit tight 留在原处;
sit in 静坐示威;
sit in judgment 评论某人
8. I like learning different kinds of folk dance, which makes me feel energetic.
我喜欢各种民族舞，它让我充满活力。
还能这样说：
No matter what kind of folk dance it is, I like learning it. Because it makes me lifeful.
I like all kinds of folk dance, which makes me feel so alive.
谚语：
Idle folks lack no excuses.
懒汉不愁没有推辞的借口。