It was only with the help of the local guide _______.
| A．was the mountain climber rescued |
| B．that the mountain climber was rescued |
| C．when the mountain climber was rescued |
| D．then the mountain climber was rescued |
He didn't realize he had forgot his bag _____ the plane had taken off.
| A．unless | B．until | C．if | D．or |
_____ of the new aircraft will start next year.
| A．produce | B．production | C．product | D．productive |
The girl had to ____the college entrance exam because of her maother’illness.
| A．leave | B．abandon | C．desert | D．pause |
You can see the village _____a distance of 20 miles.
| A．in | B．on | C．off | D．at |
— I'm sorry. I lost the key to your bike.
—________. I have another one.
| A．You’re welcome | B．Oh, really |
| C．It doesn't matter | D．That’s all right |