A. that a big B. a that big C. big a that D. that big a

17. Scientists study ____ human brains work to make computers.

A. when B. how C. that D. whether

18. We are said to be living in ____ Information Age, ____ time of new discoveries and great changes.

A. an; the B. 不填; the C. 不填; a D. the; a

19. I got close enough to hear them speaking Chinese, and I said “Ni Hao ” just as I ____ do in China.

A. must B. might C. can D. should

20. It’s surprising that your brother _____ Russian so quickly—he hasn’t lived there very long.

A. picked up B. looked up C. put up D. made up

第二节 完形填空(共20小题;每小题1.5分，满分30分)

阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项，并在答题卡该项涂黑。

Lightning flashed through the darkness over Sibson’s bedroom skylight(天窗).Sibson was shaken by a clap of thunder ____21___ he knew what was happening. The storm had moved directly _____22____ his two-story wooden house. Then he heard the smoke alarm beeping.

Sibson rushed down the stairs barefoot to 23 ; he opened the door to the basement(地下室), and flames 24 out. Sibson ran back upstairs to call 911 from his bedroom. “I felt 25 because the room had a separate outdoor stairway,” he explains.

But the phone didn’t work, and when he tried to go down the outdoor stairway, he was 26 by a wall of flames. Sibson realized he was trapped(困住).

Sibson’s house was three kilometers 27 the main road and was so well hidden by trees that he knew calling for help would be 28 .

Up a hill nearby lived Sibson’s neighbor, Huggons. He was lying in bed when something like a smoke alarm 29 his ears. He jumped out of bed, took his 30 and flashlight, and headed down the hillside toward the 31 . That was when he saw the rolling heavy smoke.

Huggons dialed 911, and the operator warned him not to 32 the house. But Huggons said, “There is no way I am going to listen to Sibson 33 and die in that fire.”

“Anyone there?” Huggons called out. Then he heard “Help! I’m trapped!” coming from the second-floor balcony(阳台). He entered the house, but soon had to run back to catch his 34 .

After one more 35 inside the house, Huggons gave up and 36 around back.

The wind parted the smoke just 37 for him to catch sight of Sibson. But there was no way to get to him. He 38 the flashlight into the woods and noticed a ladder. He took it over to the balcony and 39 Sibson down just as the second floor of the house fell off.

Sibson is still 40 when he tells the story. “ I was alone that night,” he says. “Then I heard the most beautiful sound in my life. It was Huggons.”

21. A. before B. while C. since D. until

22. A. on B. in C. through D. over

23. A. hide B. wait C. check D. escape

24. A. moved B. gave C. went D. exploded

25. A. safe B. worried C. glad D. tired

26. A. burned B. stopped C. shocked D. covered

27. A. beside B. off C. across D. along

28. A. limited B. false C. fruitless D. regretful

29. A. struck B. missed C. touched D. passed

30. A. coat B. key C. basin D. phone

31. A. noise B. road C. smoke D. danger

32. A. search B. enter C. leave D. damage

33. A. call B. roll C. scream D. sigh

34. A. breath B. attention C. ladder D. flashlight

35. A. stay B. chance C. thought D. attempt

36. A. climbed B. circled C. looked D. jumped

37. A. clear B. open C. enough D. fit

38. A. led B. put C. drove D. shone

39. A. persuaded B. kicked C. pulled D. forced