Read the text and decide which answer A, B, C, or D best fills each gap. (Đọc văn bản và quyết định câu trả lời A, B, C, hoặc D phù hợp nhất với mỗi khoảng trống.)

When you are in Hong Kong, you can go about by taxi, by tram, by bus, or (1) underground. I prefer the underground (2) it is fast, easy and cheap. There are (3) trams and buses in Hong Kong, and one cannot drive on the road (4) and without stopping many times. The underground is therefore usually quicker (5) taxis or buses. If you do not know Hong Kong very well, it is very difficult (6) the bus you want. You can take a taxi, but it is (7) expensive than the underground or a bus.

At the underground you can find good maps that tell you the station names and show you (8) to get to them, so that it is easy to find your way.