_____such heavy pollution already, it may now be too late to clean up the river.
| A． Having suffered | B．Suffering | C．To suffer | D．Suffered |
This is by farmovie that I have ever seen.
| A． | an inspiring | B． | a more inspiring | C． | the most inspiring | D． | a much inspiring |
Briggs will as general manager when Mitchel retires.
| A．get away | B．take over | C．set off | D．run out |
Hard is feeling uncomfortable.He _____ too much at the party last night.
| A．could drink | B．should drink | C．would have drunk | D．must have drunk |
We are confident that the environmenr by our further efforts to reduce pollution
| A．had been improved | B．will be imroved | C．is improved | D．was improved |
To her joy,Della earned first the trust of her students and of her collegues.
| A．that | B．one | C．ones | D．those |