A great number of people were killed in the big fire, and the number of the people who _____ missing _______still increasing.
| A．were; was | B．are; is | C．were; is | D．are; was |
The old rules have to be ______ because they only applied to the circumstances that existed when they were made a hundred years ago.
| A．developed | B．established |
| C．observed | D．revised |
Seeing the big crowd coming towards him, he started to run down the hill, but ______ and went down on his hands and knees in the melting snow.
| A．slipped | B．skied | C．signalled | D．sank |
When Richard said, “You are much more agreeable and prettier now,” Joan’s face turned red at the unexpected ______.
| A．command | B．comparison |
| C．compliment | D．contribution |
Her ______ for writing was a desire for women to get the right to higher education.
| A．motivation | B．qualification |
| C．talent | D．technique |
If we go on using energy so wastefully, __________ are that our oil wells will be dried up before new energy sources can be found to replace oil.
| A．chances | B．opportunities |
| C．questions | D．problems |