The employment rate has continued to rise in big cities thanks to the efforts of the local governments to increase________.
| A．them | B．those |
| C．it | D．that |
— I don’t know whether I should go abroad or not, Mum.— I leave _______ to your own judgment whether you should do it.
| A．that |
| B．it |
| C．this |
| D．what |
_______ is well known _______ Hong Kong returned to China on July 1st, 1997.
| A．It, that |
| B．As, / |
| C．As, as |
| D．It, which |
The Parkers bought a new house but ______ will need a lot of work before they can move in.
| A．they |
| B．it |
| C．one |
| D．which |
It used to be thought _____ the Earth was flat.
| A．as |
| B．when |
| C．since |
| D．that |
He made _____ known to his friends that he didn’t want to enter politics.
| A．that |
| B．it |
| C．himself |
| D．him |