Overhead bridges can be seen in many parts of Singapore,in the places where traffic is very heavy and crossing the road is 　1 　.

These bridges can make people cross roads safely.Overhead bridges are used in very much the same way as zebra crossings.

They are more efficient(效率高的), 　2 　less convenient(方便的)because people have to climb up a lot of steps.This is inconvenient to the old.When people 3 an overhead bridge,they do not hold up(阻挡)traffic.But when they cross a 　4 　road using a zebra crossing traffic is held up.This is why the government(政府)has built many overhead bridges to help people and 　5 　traffic moving at the same time.

The government of Singapore has 　6 　a lot of money building these bridges.For their own safety,people should be given hope to use them 　7 　rushing across the road.Old people may find it a little 　8 　climbing up and down the steps,but it is still much safer than walking across the road 　9 　all the moving traffic.

Overhead bridges are very useful.People,both old and young,should 　10 　use them.This will stop accidents from happening.

15.(　　 )--Do you mind if I sit here?

　　　　 --No,but____.It’s for the old,young man.

A.of course not　　 B.better not　　 C.take it　 D.not at all

14.(　　 )It is____cheaper and____enjoyable to travel by train than by plane.

A.very,very much　　 B.more,much more　 C.much,much　　 D.much,far more

13.(　　 )The girl was ill.____,she didn’t go to school yesterday.

A.In order to　　 B.As soon as　　 C.As a result　　 D.So as to

12.(　　 )He doesn’t know____he should do with the robot.

A.how　　 B.what　　 C.why　　 D.who

11.(　　 )--Could you tell me when____?　　　　 --At 10:25,in ten minutes.

A.the bus has left　 B.the bus had left　 C.will the bus leave　 D.the bus will leave

10.(　　 )You can’t imagine____when they received these nice gifts.

A.how they were excited　　　 B.how excited they were

C.how excited were they　　　 D.they were how excited