It's ten years since the scientist _______on his life's work of discovering the valuable chemical.
| A．made for | B．set out | C．took off | D．turned up |
Peter graduated from university in 1998. He ____ in a high school ever since.
| A．works | B．is working | C．worked | D．has worked |
A number of students____ attending the meeting now and the number of students _____more than 100.
| A．are, has reached | B．is ,has reached |
| C．are, have reached | D．is, have reached |
It seemed as if the world was ______.
| A．at an end | B．in the end | C．at the end of | D．by the end of |
She persuaded me_____ an expensive mountain bike.
| A．to buy | B．buying | C．bought | D．buy |
We _____to Sydney next Monday. What about having a party this weekend?
| A．have flown | B．flew | C．are flying | D．had flown |