We haven't settled the question of ______ it is necessary for him to study abroad.
| A．if | B．where | C．whether | D．that |
Can you lend me the novel ______ the other day?
| A．that you talked | B．you talked about it |
| C．which you talked with | D．you talked about |
I have seen trees, _____ open at sunrise and close at sunset.
| A．which the leaves | B．of that the leaves |
| C．whose leaves | D．its leaves |
___ is known to all, China is a developing country, belonging to the third world.
| A．It | B．That | C．As | D．Which |
She showed her new watch to my wife, ___ was kept in a box.
| A．who | B．which | C．that | D．it |
The reason ______he didn't come was ______he was ill.
| A．why; that | B．that; why |
| C．for that; that | D．for which; what |