environmental damage is done, it takes many years for the ecosystem（生态系统）to recover.
| A．Even if |
| B．If only |
| C．While |
| D．Once |
The newcomer went to the library the other day and searched for he could find about Mark Twain.
| A．wherever | B．however | C．whatever | D．whichever |
As soon as Jack saw his new sports car, he was eager to it .
| A．try; for | B．try; on | C．try; out | D．try; in |
—Are you still mad at her?
—Not really, but I can’t that her remarks hurt me.
| A．deny | B．refuse | C．reject | D．decline |
Take your time --it’s just short distance from here to restaurant.
| A．x; the | B．a; the | C．the; a | D．x; a |
Right now the writer and manager_____busy preparing for the following meeting.
| A．is | B．Are | C．was | D．were |