Rivers are one of our most important resources． Many of the world’s great cities are __1_ on rivers, and almost every country has __2__ one river flowing __3__it that plays an important part in the lives of _4__people．

    Since the beginning of history, people have used rivers __5__transportation．Some great _6___ are the Mississippi, the Nile, the Gongo etc．The _7_ of all for navigations(水路航行), however, is the Amazon in Brazil．It is so wide and so deep__8__ large ships and ocean liners can go about two thousand miles __9__it． Besides __10__, rivers __11__food, water to drink, water for crops, and opportunities(机会) __12_ fun．However, large cities and industries that are located upon rivers often make __13__, __14_the cities grow in __15__and the industries _16__ in number, the water in the rivers becomes ___17__with chemicals and other materials．People are __18__ the importance, however, of doing more to keep their rivers __19__if they want to __20__the benefits of this natural resource(供应的来源)

1．A．stood               B．located              C．lived                 D．arisen

2．A．at best              B．at last               C．at most              D．at least

3．A．through             B．cross               C．over                 D．under

4．A．their                B．it’s                 C．its                   D．theirs

5．A．with                 B．off                 C．of                   D．for

6．A．streams             B．seas                C．ocean                D．rivers

7．A．shortest             B．fastest              C．longest                D．smallest

8．A．and                B．that                 C．for                  D．where

9．A．upon               B．above               C．under                 D．below

10．A．voyage(航海)     B．making fun           C．touring                D．transportation

11．A．produce           B．explore(探索)        C．provide               D．plant

12．A．by              B．in                  C．for                  D．over

13．A．problems          B．questions            C．matters               D．affairs

14．A．If               B．As                 C．Until                  D．Unless

15．A．large              B．style                C．range                D．size

16．A．raise               B．produce            C．increase              D．expect

17．A．polluted            B．polluting            C．pollution              D．poison

18．A．seeking            B．learning             C．predicting            D．describing

19．A．dirty              B．clean               C．polluted               D．flowing

20．A．enjoy              B．refuse             C．like                  D．hate

–When did the earthquake of Ya’an happen?

–It happened _______ April 20, 2013.

A．at               B．in                C．on               D．to

What makes 15,000 men and women run for hours, and what makes them run through the streets on a cold day without coats? I was one of those runners.  The race is called marathon (马拉松).
I had never run more than eight miles before, and here I was training.  Since the race is in April, I had to run throughout the winter, and in Boston, winters are cold. For most people, just putting on their shirts, sweaters, jackets, and hats is exercise enough. I found myself out on the dark streets, running along ice sidewalks (人行道). Even in gloves, my fingers got so cold that they looked like red carrots. My nose didn’t get warm until lunchtime !
Finally, the big day arrived. The weather was cold, with ice and rain. Bang! The gun sounded, and we started. I didn’t go anywhere at first because I was standing behind so many people. I had to wait for them to move.
At first, the running was easy.  The other runners just seemed to pull me along. Somewhere around the 20-mile mark I even said to myself, "This is nothing, why did I train so hard?"
Then I hit "the wall". "The wall" is what marathon runners call the special point. I knew my body reached the point and I thought I couldn’t go any more. I was out of breath and my legs turned into pieces of wood.  I was almost falling down.  I can’t remember anything about the last five miles of the race.
I kept running though. At last, I heard a voice at the finishing line.
"You look good," my friend Ted said. "How did it feel?"
"Wonderful !" I replied.
For everything, if you devote yourself into it, there will be a way. I finished the race, at least, in my heart, I was the winner.
【小题1】Which one best describes the weather on the race day?

What makes 15,000 men and women run for hours, and what makes them run through the streets on a cold day without coats? I was one of those runners.  The race is called marathon (马拉松).

I had never run more than eight miles before, and here I was training.  Since the race is in April, I had to run throughout the winter, and in Boston, winters are cold. For most people, just putting on their shirts, sweaters, jackets, and hats is exercise enough. I found myself out on the dark streets, running along ice sidewalks (人行道). Even in gloves, my fingers got so cold that they looked like red carrots. My nose didn't get warm until lunchtime !

Finally, the big day arrived. The weather was cold, with ice and rain. Bang! The gun sounded, and we started. I didn't go anywhere at first because I was standing behind so many people. I had to wait for them to move.

At first, the running was easy.  The other runners just seemed to pull me along. Somewhere around the 20-mile mark I even said to myself, "This is nothing, why did I train so hard?"

Then I hit "the wall". "The wall" is what marathon runners call the special point. I knew my body reached the point and I thought I couldn't go any more. I was out of breath and my legs turned into pieces of wood.  I was almost falling down.  I can't remember anything about the last five miles of the race.

I kept running though. At last, I heard a voice at the finishing line.

"You look good," my friend Ted said. "How did it feel?"

"Wonderful !" I replied.

For everything, if you devote yourself into it, there will be a way. I finished the race, at least, in my heart, I was the winner.

1.Which one best describes the weather on the race day?

2. How did the writer feel about the race during the first 20 miles?

3. According to the article, what must someone do to prepare for a marathon?

4.Then I hit "the wall". What do you think "hit the wall" means here?