A. optimistic B. concerned

C. mysterious D. sceptical

7. Can you tell me how long dinosaurs on the earth before they ?

A. had existed; disappeared

B. had existed; were disappeared

C. have existed; disappeared

D. have existed; were disappeared

8. Her devotion (奉献) to her research work has won her a good in the field.

A. impression B. relationship

C. award D. reputation

9. Polar bears fast as a result of global warming so proper measures must be taken now.

A. died out B. are dying out

C. would die out D. die out

10. The police are trying to find out the of the woman killed in the traffic accident.

A. evidence B. recognition

C. identity D. status

Ⅵ. 阅读理解

阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。

　　Brownie and Spotty were neighbour dogs who met every day to play together. Like pairs of dogs you can find in any neighborhood, these two loved each other and played together so often that they had worn a path through the grass of the field between their houses.

One evening, Brownie's family noticed that Brownie hadn't returned home. They went looking for him with no success. Brownie didn't show up the next day, and, although they made their efforts to find him, by the next week he was still missing. Curiously, Spotty showed up at Brownie's house alone, barking and jumping. Busy with their own lives, they paid no attention to the nervous little neighbour dog.

Finally, one morning Spotty refused to take "no" for an answer. Ted, Brownies owner, was continuously disturbed (打扰) by the angry, determined little dog. Spotty followed Ted about, barking all the time, then darting toward a nearby empty lot and back, as if to say, "Follow me! It's urgent!"

Eventually, Ted followed Spotty across the empty lot as Spotty stopped racing back and bark encouragingly. The little dog led the man to a deserted spot a half mile from the house. There Ted found his beloved Brownie alive, one of his legs crushed in a steel trap(圈套,陷阱). Frightened, Ted now wished he'd taken Spotty's earlier appeals(呼吁) seriously.

Then Ted noticed something. Spotty had done something else besides leading Brownie's human owner to his trapped friend. In a circle around the injured dog, Ted found some food remains of every meal Brownie had been fed that week！Spotty had been visiting Brownie regularly, in the hope of keeping his friend alive. Spotty had actually stayed with Brownie to protect him from hunger and other dangers, and keep his spirits up.