Nowadays, either 21st Century or other English newspapers _____ increasingly popular among us students.
| A．are | B．is | C．were | D．was |
Does ________ matter if he can’t finish the job on time?
| A．this |
| B．that |
| C．he |
| D．it |
— 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 |