________ you have to do the job, you should try your best to do it well even though it may be very difficult for you.
| A．Since | B．While |
| C．Unless | D．Though |
Dorothy works very hard ；she shows a very positive attitude her work.
| A．to | B．with | C．of | D．about |
The retired workers were invited to the company, surprise,changes had been so great over the years.
| A．whose | B．who | C．to whom | D．to whose |
—Time . It’s likely that we’ll miss the deadline.
—Don’t worry. We have already got through 80% of the job.
| A．is running out | B．has run out | C．is being running out | D．has been run out |
on this report, the English government decided to ask Captain James Cook to go and look for this continent.
| A．Having based | B．Basing | C．Based | D．To be based |
It was only when I reread his poems recently__________ I began to appreciate their beauty.
| A．until | B．in which | C．that | D．so |