Our parents have done a lot for us. I think we should ______ them by working hard.
| A．relieve | B．repay | C．submit | D．respect |
The population of China is larger than ______ of any other country in the world.
| A．that | B．it | C．one | D．this |
Modern science has given clear evidence ______ smoking can lead to many diseases.
| A．what | B．which | C．that | D．where |
This is the first time that we ________a film in the cinema together as a family .
| A．see | B．had seen | C．saw | D．have seen |
He was told that it would be at least three more months ___________he could receover and return to work.
| A．when | B．before | C．since | D．that |
— Can the project be finished as planned?
— Sure. it completed in time, we’ll work two more hours a day.
| A．Get | B．To get | C．Getting | D．Got |