The earth is our home and we must take good care of it. That is to say we must   1   the land, air and water clean. But man    2  a lot of pollution on earth since he first made fire, washed his clothes in the river and threw rubbish on the ground. Many years ago, pollution was not so serious   3    there were not so many people.

There were enough    4   air, land and water. When the land or the river was dirty in one place, man moved to    5   place. Man is    6   the whole world now. So there is   7    enough clean air, nor clean land, nor clean water now. The more people there are in one place,    8    environment they maybe have.

Perhaps you are afraid     9   is endless(无休止的) for people to produce pollution.

    10  , we are glad to tell you that people have come to know the danger of pollution. And you can find more and more people are working hard to protect our earth.

1.                A．have           B．take           C．watch    D．keep

2.                A．produced       B．has produced    C．is producing   D．will produce

3.                A．so             B．if              C．because  D．but

4.                A．clean          B．old            C．dirty D．new

5.                A．other          B．the other       C．another  D．others

6.                A．pollute         B．polluting        C．clearing  D．clear

7.                A．neither         B．both           C．either    D．none

8.                A．the worst       B．the worse       C．the bad   D．worse

9.                A．that           B．this            C．what     D．it

10.               A．Quickly         B．Especially       C．Luckily    D．Anyway

An old man with his pale blue eyes and a smile walked slowly into the restaurant.His old cloth jaket and warm personality made him stand out from the usual Saturday morning breakfast people.

A young waitress named Mary watched him walk toward a table by the window.She ran over to him and said, “Here,Sir.Let me give you a hand with that chair.”In a soft, clear voice he said, “Thank you for your kindness.”“You’re welcome,sir.”She replied. “And my name is Mary.I’ll be back in a moment,and if you need anything,just wave me!”

After he had finished a big meal,Mary helped him up from his chair,and out from behind the table.She helped him walk to the front door.Holding the door open for him,she said, “Come back and see us,sir!”He turned with his whole body,smiled and nodded a thank you.

When Mary went to clean his table,she almost let out a cry.Under his plate she found a 100-dollar bill with a note,which read, “Dear Mary,you have found the secret of happiness.Your kindness will shine through those who meet you.”

The man she had waited on was the owner of the restaurant where she worked.This was the first time that she,or any of his workers had ever seen him in person.

51. The old man came to the restautant to have_____.

A. supper　　　　 B. dinner　　　　 C. breakfast　　　　 D. afternoon tea

52. What can people remember about the man?

A. His pale blue eyes　　　 B. His warm personality

C. His way of walking　　　 D. His way of standing

53. According to the old man,what is the secret of happiness?

A. Smile.　　 B. Patience.　　 C. Service.　　 D. Kindness.

54. The underline phrase waited on means______.

A. looked at　 B. served　　　 C. waited for　 D. found

55.Mary didn’t know the old man was the owner of the restaurant because _____.

A. he was dressed well.

B. he looked very poor.

C. Mary was a new waitress of the restaurant.

D. none of his workers had seen him before.