班级________ 姓名__________ 分数__________
I．完形填空
（2012·四川卷）
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。
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 twostory 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)．
