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 out. Sibson ran back upstairs to call 911 from his

bedroom. ―I felt 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

by a wall of flames. Sibson realized he was trapped（困住）.

Sibson‘s house was three kilometers by trees that he knew calling for help would be .

Up a hill nearby lived Sibson‘a smoke alarm

flashlight, and

said, ― ―.

Sibson down just as the second floor of the house fell off.

. ― I was alone that night,‖ he says. ―Then

‖

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