We are traveling to the countryside ... bus. He goes to school ... five o'clock ... the morning

1. We are traveling to the countryside ..............bus
A.on.             B.in.              C.from.             D.by.
2. He goes to school ...........five o'clock ............ the morning 
A.on/in.       B.for/at.        C.in/on.           D.at/in