Excuse me, ........ you please show me the way to the auditorium?

Mona is busy at the moment. She .................... her homework.

Dave was hoping to reach Jubail by 4 o'clock, ................... his car broke down on the way.

He worked ...... forty years before he decided to retire.

If I graduate this year, I ......................... with my family.

Choose the sentence with the RIGHT PUNCTUATION.