Hey Haewon!
Here is a handout for a mix of rhetoric questions. It is for the ACT, which includes some types of questions that the SAT does not test ("suppose the writer's goal" questions and "if you delete, what would you lose" questions). You can just skip those. There are many function quetsions that you can tackle from this handout. It's hard to find extra questions JUST for function, but I think this handout will suffice. Best of luck!
You got this!