The research is so designed that once __________ nothing can be done to change it.
| A．begins |
| B．having begun |
| C．beginning |
| D．begun |
The food wasn't good, but________it was cheap.
| A．at most |
| B．at least |
| C．in the least |
| D．not least |
I could see a car________， but couldn't make out what color it was.
| A．at the distance |
| B．in the distance |
| C．off the distance |
| D．from the distance |
He proved himself a true gentleman and the beauty of his ________was seen at its best when he worked with others.
| A．temper |
| B．appearance |
| C．talent |
| D．character |
“We can't go out in this weather，”said Bob，________out of the window.
| A．looking |
| B．to look |
| C．looked |
| D．having looked |
It is widely accepted that young babies learn to do things because certain acts lead to________.
| A．rewards |
| B．prizes |
| C．awards |
| D．results |