—I’m losing my eyesight, I’m afraid.
—To finish this book, you ______ in front of your computer too long.
| A．work | B．are working | C．have been working | D．worked |
Could I have a cigarette? I seem_________.
| A．to run out | B．to have run out |
| C．to have run out of | D．to have been run out |
Are you satisfied with the way_______ he explained the problem?
| A．which | B．by which | C．in that | D．/ |
The reason_______ so many people rushed to California was ______ another gold mine was found in California.
| A．that; because | B．why; that | C．that; why | D．why; because |
They have_______ carefully the time and money needed to complete the project.
| A．picked out | B．left out | C．taken out | D．figured out |
He________ to get a high position in the company, but failed because of his carelessness.
| A．managed | B．attempted | C．succeeded | D．thought. |