A;What do you think is the most comfortable _ to travel?
B;Riding the bike._ the way,where are you going this afternoon?
A;I'm going _ a farm.
B:How _ is it ?
A:About two kilometres.
B:How are you going there?
A:We had better _ our bikes.Would you like to go with me?
B:Why not ?When are we going to leave?
A:How about four o'clock?
B:Let's make it a little earlier.
A:Well,let's make it three.
B:Ok!