environmental damage is done, it takes many years for the ecosystem to recover.
| A．Even if |
| B．If only |
| C．While |
| D．Once |
______ a leading role in a new film, John has a chance to become famous.
| A．Offer | B．Offering | C．Offered | D．T o offer |
---Try not to work too hard. Relax yourself.
-- Thanks. _________
| A．So what? | B．No way | C．You, too. | D．What for? |
Mary decided not to work on the program at home because she didn’t want her parents to know what she __________.
| A．has done | B．had done | C．was doing | D．is doing |
It’s very surprising that Lucy _____ German so quickly—she hasn’t lived there very long.
| A．picked up | B．looked up | C．put up | D．made up |
The internet has made ____ possible for everyone to talk with friends miles away.
| A．that | B．this | C．one | D．it |