When you are in Singapore,you can go about (1)____ taxi,by bus,or by underground.I myself prefer the underground (2)____ it is fast,easy and cheap.There are many buses and taxis in Singapore and one cannot drive along the road (3)____ and without many stops,especially on Monday morning.The(4)____is therefore usually quicker than taxis or buses.If you do not know Singapore very well,it is difficult to find the bus you want.You can(5)____a taxi,but it is more expensive than the underground or a bus.On the underground,you find good(6)_____that tell you the names of stations and show you how to get to them,so that it is easy to find your way. 1   A.in    B.by    C.on    D.at 2   A.however    B.so    C.because    D.then 3   A.slow    B.slowly    C.quick    D.quickly 4   A.plane    B.ship    C.bike    D.underground 5   A.buy    B.miss    C.take    D.forget 6   A.books    B.maps    C.internet    D.plan