Use (while, when, until, before and after) to join the following pair of clauses to one sentence . 1. (a) you wish to travel a short distance (b) you can choose to ride on a bicycle 2. (a) travelling long distance (b) Some people enjoy more 3 (a) people wait at the station (b) the train arrives 4 (a) they will board the train (b) its arrival 6 (a) the plane's departure (b) there are so many preparations 7 (a) you need to choose a mode of transport (b) you to travel