When she was doing the cleaning yesterday, Mum found the ring that she _____ years ago.
| A．loses | B．has lost | C．lost | D．had lost |
Young men should constantly _________their own state of mind so as to adapt to the circumstances in which fierce competition is going on .
| A．modify | B．adjust | C．conduct | D．liberate |
Although microblog(微博) is becoming more and more popular, it doesn’t _____ all teenagers.
| A．take up | B．appeal to | C．stand for | D．go through |
He studied the project carefully, determined ______ it ahead of time.
| A．finish | B．finishing | C．to finish | D．to have finished |
—Hi, Lucy, I’m wondering whether I can use your mobilephone for a while.
—I hate to say, but ______.
| A．it’s being repaired | B．it has been repaired | C．it’s repaired | D．it had been repaired |
The bus crashed into a truck in front of it, ______ 40 deaths and more wounded.
| A．cause | B．causing | C．caused | D．to cause |