HOMEWORK CORRECTION: 

A.

I want everyone to rest on their birthday, except for people who do important things should no rest. For example, the president.

=> Corrected: The sentence is corrected grammatically.​

 ​ 

B.

What did you do yesterday? ✔​

"I went to the fish market." ✔​

You did?

=> This sentence is okay. This is another way of saying it.

Oh, did you?