Answer:
Ask him you need more time to practice.
Step-by-step explanation:
If your teacher is nice, he may let you be able to give you extra time to do this assignment or more time to be able to practice. Never sit out on things like this, if you can't do it with lots of practice then I suggest telling the teacher that "this is too hard for me" and they may give you extra help if you ask for it. But remember, it isn't good to sit out on stuff like this!