【一】Highways in the United States
The United States is well-known for its network of major highways designed to help a driver get from one place to another in the shortest possible time. __1__ these wide modern roads are generally __2__ and well maintained， with few sharp curves and __3__ straight sections， a direct route is not always the most __4__ one. Large highways often pass __5__ scenic areas and interesting small towns. Furthermore， these highways generally __6__ large urban centers which means that they become crowded with __7__ traffic during rush hours， __8__ the “fast， direct” way becomes a very slow route. However， there is almost always another route to __9__ if you are not in a hurry. Not for from the relatively new “superhighways”， there are often older， __10__ heavily traveled roads which go through the countryside. __11__ are good lane roads; others are uneven roads curving __12__ the country. These secondary routes may go up steep slopes， along hilly cliffs or down frightening hillsides to towns __13__ in deep valleys. Though these are less __14__ routes， longer and slower， they generally go to places __15__ the air is clean and the scenery is beautiful， and the driver may have a chance to get a fresh， clean view of the world
1.A)Although B)But C)Since D)Because
2.A)uneven B)bumpy C)rough D)smooth
3.A)little B)much C)many D)few
4.A)terrible B)horrible C)tolerable D)enjoyable
5.A)to B)into C)at D)by
6.A)merge B)connect C)combine D)mix
7.A)busy B)small C)large D)heavy
8.A)when B)where C)which D)that
9.A)walk B)go C)take D)fix
10.A)more B)less C)very D)extremely
11.A)all of these B)None of these C)All roads D)Some of these
12.A)out of B)out C)through D)from
13.A)lying B)lie C)lies D)lay
14.A)direct B)indirect C)enjoyable D)beautiful
15.A)these B)which C)that D)whereＷww.KaＯ8.CC
参考答案：A D C D D B D A C B D C A A D
【二】The Greatest Mystery of Whales
The whale is a mammal - warm-blooded, air-breathing, giving birth to its young alive, sucking them-and, like all mammals, originated on land. There are many signs of this. __1__ front flippers, used for steering and stability, are traces of feet.
Immense strength is built into the great body of the big whales, and in fact most of a whale's body is one gigantic muscle. The blue whale's pulling __2__ has been estimated at 400 horsepower. One specimen was reported to have __3__ a whaling vessel for seven hours at the __4__ of eight knots.
An enraged whale will attack a ship. A famous __5__ of this was the fate of whaler Essex, which was sunk __6__ South America early in the last century. More recently, steel ships have had their plates buckled in the same way. Sperm whales were known to __7__ the old-time whaleboats in their jaws and crush them.
The greatest mystery of whales is their diving ability. The sperm whale __8__ the bottom for his favourite food, the octopus. __9__ he is known to go as far down as 3,200 feet, where the pressure is 1,400 pounds, to the square inch. Doing __10__ he will remain submerged as long as one hour. Two feats are involved in this : storing up enough __11__(all whales are air-breathed) and withstanding the great change in pressure. Just __12__ he dose it scientists have not determined. It is believed that some of the oxygen is stored in a special system of blood vessels, rather than just held in the lungs. And __13__ that a special kind of oil in his head is some sort of compensating mechanism that automatically adjusts the internal pressure of his body. But __14__ you can't bring a live whale into the laboratory for study, no one __15__ just how these things work.
EXERCISE:
1. A)Their B)His C)Theirs D)Its
2. A)strength B)width C)height D)length
3. A)eaten B)crashed C)towed D)lifted
4. A)distance B)rate C)voyage D)sail
5. A)picture B)film C)example D)book
6. A)off the coast of B)of the coast of C0away the coast of D)in the coast of
7. A)hit B)seize C)damage D)overturn
8. A)sink to B)rest on C)dive to D)hide on
9. A)In that search B)Because of this C)In spite of that D)In support of this
10. A)so B)such C)above D)the same
11. A)air B)oxygen C)energy D)heat
12. A)what B)where C)how D)when
13. A)it is believed B)he believes C)we believe D)it believes
14. A)because of B)due to C)since D)owing to
15. A)communicates B)knows C)hears D)develops
答案: D A C B C A B C A A B C A C B
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