______ it have been the failure to pick up directions from the ground control that caused the air crash?
| A．Must | B．Could | C．Would | D．Should |
________in thought, he almost ran into a passing truck
| A．Losing | B．Having lost | C．Lost | D．To lost |
The thief was brought in with his hands ________behind his back
| A．to be tied | B．tied | C． being tied | D．tie |
I couldn’t accept the fact____my best friend, John cheated me and I cried at that moment
| A．that | B．when | C．what | D．which |
The children made so much noise that the teacher ____them and shouted" Be quiet "
| A．glanced at | B．stare at | C．looked at | D．glared at |
After graduation, Bill went to mountainous village and devoted himself _____there
A to teach B to teaching C taught D teach