If the drought in Southwest China, the crops will be ruined. Worse still, both people and animals will be threatened with a lack of drinking water.
| A．keep to | B．deeps up | C．keeps off | D．deeps down |
— Would you like to join us in a field trip this weekend?
— I’d like to. But I can’t ______ the time because I have an important exam to take on Monday.
| A．kill | B．take | C．afford | D．spend |
Just a few minutes every day, _______ you could have shining floors and furniture with this new cleaner.
| A．but | B．and | C．or | D．so |
— If I hadn’t been caught in the heavy rain, I could have been back by 7 o’clock.
— What a pity! Stella _______ here to see you.
| A．is | B．has been | C．would be | D．was |
Mr. Blake drove slowly on the way home until he arrived ______ the speed limit was 60 miles per hour.
| A．because | B．which | C．where | D．that |
The pilot asked all the passengers on board to remain _________ as the plane was making a landing. 
| A．seat | B．seating | C．seated | D．to be seating |