题目内容：

完形填空。

Overhead bridges can be seen in many parts of Singapore, in the place where traffic is very heavy and crossing the road is not safe.

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

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

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

Overhead bridges are very       . People, both old and young, should always use them.

1.A. cross          B. crossing           C. across      D. through

2.A. pass           B. use              C. visit          D. build

3.A. wide          B. narrow            C. busy           D. free

4.A. what          B. why               C. when           D. where

5.A. made          B. let                C. built          D. asked

6.A. see            B. keep              C. find           D. feel

7.A. build         B. built              C. building     D. to build

8.A. difficult    B. different         C. worried        D. excited

9.A. past          B. along              C. about          D. with

10.A. relaxing      B. boring            C. useful       D. exciting