Yang Liwei was a student at this flight school from 1983 to 1987, he studied very hard and was made chairman of the Students’ Union.
| A．during which time | B．for which time |
| C．during whose time | D．by that time |
According to the rules of the factory, you can ask for leave ________ you have a doctor’s diagnosed(诊断) note.
| A．now that | B．if | C．unless | D．even though |
Why don’t you bring ______ to his attention that you are too ill to go on working?
| A．them | B．that | C．this | D．it |
______ as planned, our work was highly thought of(受到高度评价).
| A．Completed | B．Completing |
| C．Having completed | D．To be completed |
In the past few years, sea ice ____ in the Arctic as a result of global warming.
| A．had melted | B．has been melting | C．melted | D．is melting |
Peter told us the work would be finished by next month, _____ personally I doubt very much.
| A．that | B．when | C．which | D．it |