1.Air travel frightens many people PLANE => Many people find traveling by plane frightening.
2.The train is the quickest way to get to London from here ON => The quickest way to get to London from here is geting on the train.
3.Sometimes it is quicker to walk than to drive to work FOOT => Sometimes it is quicker to go on foot than to drive to work
4. The bicycle is my favourite form of transport BY => I prefer to commute by bike than any other way
5. The departure time for the train is 7:00 AT => The train leaves at 7:00.
6.What do you intend to do with all that money? ARE => What are you going to do with all that money?