Điền từ thích hợp vào chỗ trống

    When you are in Hong Kong, you can go about by taxi, by tram, by bus, or (1) ................. (in/ by/ on/ with) underground. I myself prefer the underground (2) ................. (because/ when/ so/ but) it is fast, easy and cheap. There are (3) ................. (some/ a lot/ many/ few) trams and buses in Hong Kong, and one cannot drive along the road (4) ................. (quick/ quicker/ quickly/ quickest) and without many stops. The underground is therefore usually quicker (5) ................. (as/ than/ so/ like) taxis or buses. If you do not know Hong Kong very well, it is very difficult (6) ................. (finding/ to find/ found/ to finding) the bus you want. You can take a taxi, but it is (7) ................. (more/ much/ as/ too) expensive than the underground or a bus. On the underground you find good maps that tell you the names of the stations and show you (8) ................. (who/ when/ what/ how) to get to them so that it is easy to find your way.