At the time of the earthquake Jeff was still in his office. He ________ to finish a project before he left for the day.
| A．has tried | B．had tried | C．has been trying | D．had been trying |
It was not until 1938 _________ the first colour TV programme was broadcast.
| A．which | B．that | C．when | D．on which |
Mr. John was so humorous that we had a good laugh ______ the meal.
| A．at | B．over | C．in | D．between |
I don’t think it easy, even if we work hard, ______ the South Korea and the North Korea to sit down to talk at present.
| A．persuaded | B．to persuade | C．persuade | D．persuading |
No student ______ go out of the school campus after 10:00 at night without permission according to the school regulations.
| A．shall | B．must | C．would | D．should |
“Ungelivable” is so new an English word coined on the Internet ______ is forbidden to appear in official media or documents at present.
| A．that | B．which | C．it | D．as |