___you understand this rule, you will have no further difficulty.
| A．Once | B．At once | C．Only | D．Only then |
The workers agreed to ________ the strike if the company would satisfy their demands.
| A．call for | B．call in | C．call off | D．call up |
These articles ________ the problems of the modern world, including race relations and community development.
| A．address | B．avoid | C．create | D．correct |
Urban crowdedness would be greatly relieved if fares ________ on public transport were more reasonable.
| A．offered | B．spent | C．paid | D．charged |
--- I forgot to do my homework. Don’t tell the teacher.
--- I won’t tell anybody, but do you think you can _______ it?
| A．get away from | B．break away from |
| C．get away with | D．run away from |
It’s not until we know more about it _______ be able to improve the situation.
| A．will we | B．we will |
| C．that will we | D．that we will |