Project Hope has built many schools ________ big classrooms and libraries.

A．in               B．of               C．for               D．with

Sam is twenty-seven now. He’s tall and strong. He worked hard in the small field. He’s known a girl called Mabel for three years, who lives in another village. He wishes she could marry him soon, but she won’t marry him until he has built a new house. He hasn’t enough money. Of course it’s difficult for him to do so.
Winter had come and the fields were covered with thick snow. Sam had nothing to do at home. Mabel told him to find some temporary employment in the town. He thought she was right and came to Mr White’s factory, where he carried stones from the hill to the workplaces. It was hard work but he was paid more. At the end of the month Mr White paid the young man nearly two thousand dollars. He was very happy. He hurried to the post office, but it was closed. He had a look at the clock on the wall. It was half past five, and he was told to go there the next morning. He had to return to the factory. He felt hungry and went into a restaurant and ate something. He didn’t see a thief following him, and as soon as he sat at table, the man sat down next to him and asked him to drink a cup with him. He agreed and drank a lot. And when he woke up two hours later, his money was stolen. He was sad of it and cried for a long time.
The following day Mr White saw the young man’s eyes were red and asked what had happened to him. He told him about it and at last he said, “I worked for the thief last month!”
根据材料内容选择最佳答案，将其标号填入题前括号内。
【小题1】Mabel doesn’t marry Sam because _______.

—What has ________ done since 1989?.
—It has built many schools for poor children .

1.Have you          (do) anything to keep the water clean?

2.Project Hope has built schools and        (library).

3.Our city        (change) a lot since 2001.

4.The girl left the classroom without         (say) anything?

5.All of us want to know how         (play) computer games.

Overhead bridges can be seen in many Parts of Singapore，in the places where traffic is very  41 and crossing the road is not safe.
These bridges can help people cross roads  42  . Overhead bridges are used in very much the same way  43 zebra crossings.
They are more efficient(效率高的)，thou  44 convenient(方便的)because people have to climb up a lot of steps．This is inconvenient to the old. When people use an overhead bridge，they do not  45 traffic. But when they cross a busy road using a zebra crossing, traffic is kept back. This is  46 the government has built many overhead bridges to help people and keep traffic moving at the same time.
The government of Singapore has spent a lot of money  47 these bridges. For their own safety, people should be advised to use them instead of rushing across the  48 . Old people may find it a little difficult to climb up and  49 the steps, but it is still much safer than walking across the road with all the moving traffic.
Overhead bridges are very  50  . People，both old and young，should always use them. This will stop accidents from happening.