Choose the best answers to complete the following sentences.
Find one mistake in each of the following sentences.
Read the following text carefully and choose the correct answer A, B,
Cor D for each of the gaps.
When you are in Singapore, you can go about ___(41)___ taxi, by bus, or by underground. I myself prefer the underground ___(42)___ it is fast, easy and cheap. There are ___(43)___ buses and taxis in Singapore and one cannot drive along the road ___(44)___ and without many stops, especially on Monday morning. The underground is therefore usually quicker ___(45)___ taxis or buses. If you do not know Singapore very well, it is difficult ___(46)___ the bus you want. You can take a taxi, but it is ___(47)___ expensive than the underground or a bus. On the underground, you find good maps that ___(48)___you the names of the stations and show you ___(49)___ to get to them, so ___(50)___ it is easy to find your way.