Travelling in a hot-air balloon is 1) solw slow, but . You can't sit and you quite 2) feas have to stand the whole time. It is also very to ride in a 3) eexsivpne hot-air balloon. The underground is a popular means of transport It is 4) afts and 5) pceha too. The only problem with the underground is that it can be 6) yinos sometimes. and 7) dtiyr