____carefully for a long time, the opening was a great success
| A．To have been prepared |
| B．Having been prepared |
| C．To be prepared |
| D．Being prepared |
37. No one has come up with a better explanation of why dinosaurs ______.
| A．died away | B．died for | C．died of | D．died out |
36. —Was the guest’s speech interesting?
—Not at all. He was at a ______ and didn’t know what to say when others asked him questions.
| A．loss | B．relief | C．goal | D．Mercy |
35. —What’s that noise?
—Oh, I forgot to tell you. Your bike ______.
| A．was repaired | B．will be repaired |
| C．is being repaired | D．has been repaired |
34. English is considered as a(n) _______ language, and it is no surprise that there are so many people in the world learning it.
| A．universal | B．logical | C．artificial | D．Regular |
33. —We want to sit at the table near the door.
—I’m sorry, but it _______ already.
| A．was taken | B．has taken | C．will be taken | D．has been taken |