[单项选择]Slotin did not call the hospital for help until ______.


A. the screwdriver slipped
B. a chain reaction began
C. he apologized to his co-workers
D. he calmly handled the accident

[单项选择]Slotin did not call the hospital for help until ______.


A. the screwdriver slipped
B. a chain reaction began
C. he apologized to his co-workers
D. he calmly handled the accident

[单项选择]Which signal is a call for help [A] Shouting here and there. [B] Crying twice. [C] Shouting or whistling three times together.

[单项选择]Not until （　） his shoes did he enter one of the low -ceilinged rooms of the Japanese house.
A. did he remove
B. he had removed
C. had he removed
D. he removed

[单项选择]Why did the man make the phone call


A. Because he wanted his wife to see the last film.
B. Because he and his wife both wanted to see the last film.
C. Because he felt tired and wanted to stay at home.

[单项选择]Did anyone call me when I was out
A. invite
B. name
C. answer
D. phone

[单项选择]Why did Rosy study until very late at night


A. She wanted to pass the exams.
B. She had not worked very much.
C. She wanted her sister to worry about her.
D. All the students were working hard.

[单项选择]When did the man call the woman last time


A. Yesterday morning.
B. Yesterday noon.
C. Yesterday afternoon.
D. Yesterday evening.

[单项选择]

Text 3
This line of inquiry did not begin until earlier this month—more than three months after the accident—because there were "too many emotions, too many egos," said retired Adm. Harold Gehman, chairman of the Columbia Accident Investigation Board.
Testifying before the Senate Commerce Committee, Gehman said this part of his inquiry was in its earliest stages, starting just 10 days ago. But Gehman said he already has concluded it is "inconceivable" that NASA would have been unable or unwilling to attempt a rescue for astronauts in orbit if senior shuttle managers and administrators had known there was fatal damage to Columbia’s left wing.
Gehman told reporters after the hearing that answers to these important questions could have enormous impact, since they could place in a different context NASA’s decisions against more aggressively checking possible wing damage in the days before Columbia’s fata
A. Gehman's Comment on Columbia Accident
B. NASA's Problems Exposed
C. An Inquiry into Columbia Accident
D. A Reflection on Shuttle's Safety

[单项选择]She did not throw away the stockings until they were so ______ that they couldn't be mended anymore.
A. wearing off
B. worn out
C. wearing out
D. worn off