Writing - Comma 1

Put in commas where necessary. If a sentence is correct, type no comma in the textbox.
1) Unless you give me the tools I won't be able to repair the car.
2) My aunt Fiona whom you have just met is a waiter.
3) To tell you the truth he would do anything to win her heart.
4) Susan had a bad cold so her father took her to the doctor.
5) He's very good at Maths but still isn't able to answer correctly.
6) She rushed to the station but she was too late.
7) My teacher criticised me because I didn't do my homework.
8) I have to buy apples oranges grapes and bananas.