How do you feel today?                                                      

你觉得今天如何？

I feel happy/fine/great/good.                                               

我觉得很好。

I'm glad you praised me. /I'm glad you said good things about me.

我好高兴你赞美我。

I'm happy I did a good job on the test.                                

我好高兴我考试考的很好。

I feel best when you hold me.                                             

当你抱着我，我最开心了。

Mom's really happy when you eat a lot of my food.

当你吃很多我煮的菜时，妈妈真的很开心。

Mommy's glad that you're happy.                                      

看到你开心，妈妈也很开心。

It is said that smiling spreads to other people.                    

据说，笑是可以传播给其他人的。