Once harm ______ to the environment, it takes years to have the system recovered.
| A．does | B．is done | C．will be done | D．be done |
相关试题
Compared with his sister, Jerry is even more ____ to, and more easily troubled by , emotional and relationship problems.
| A．sceptical | B．addicted | C．available | D．sensitive |
Schools across China are expected to hire 50,000 college graduates this year as short-term teachers, almost three times the number hired last year, ____ reduce unemployment pressures.
| A．help | B．to have helped | C．to help | D．having helped |
--- Hi, Terry, can I use your computer for a while this afternoon?
--- Sorry. .
| A．It' s repaired | B．It has been repaired |
| C．It's being repaired | D．It had been repaired |
--- I' m surprised to hear that Sue and Paul have __ .
----So am I. They seemed very happy together when I last saw them.
A. broken up B. finished up C. divided up D closed up
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