Which sentence is correct?

Please do not touch… .............. that I put on the table as I want to take it to my class party.

Jane: Do you eat a lot of fast food at university? Jenny: Yes, I eat ...... two or three times a week.

Alex… ........... in the face by his little brother.

Mr. Brown: What are you doing ? Mr. Davis: I'm ............. my car.

The lunch was delicious. ........ enjoyed it.