Write at, by or on to fill in the sentences.
1) My grandmother died ........ the age of 98.
2) How long does it take from New York to Los Angeles........ plane?
3) I did not go to the football match but I watched it ..... television.
4) These trains are very fast. They can travel ...... very high speeds.
5) The buses here are very good. They are nearly always ..... time.
6) We travelled from Paris to Moscow..... train.
7) I always go to school .... bus never ..... foot.