—Did you get my letter?
—I received one just as I_________.
| A．set out | B．had set out | C．was setting out | D．would set out |
Although the old man was ______ death, he still fought with the disease bravely.
| A．at the end of | B．on the top of |
| C．at the edge of | D．on condition that |
Many countries are increasing their use of natural gas, wind and other forms of ______.
| A．energy | B．power | C．force | D．strength |
It may not be a great suggestion. But before ______ is put forward, we will make do with it..
| A．a best one | B．the best one |
| C．a better one | D．a good one |
Try not to cough more than you can ______ since it may cause problems to your lungs.
| A．help | B．stop | C．allow | D．check |
He was unhappy when he sold his guitar. After all, he ______ it for a long time..
| A．had had | B．has had | C．has | D．had |