The bell ______ the end of the period rang, ______ our heated discussion.
| A．indicating; interrupted | B．indicated; interrupting |
| C．indicating; interrupting | D．indicated; interrupted |
He bought a book that could glee him much knowledge and ______ could help him to kill the time．
| A．that | B．where | C．which | D．there |
Whenever I met him, _______ was fairly often, I like his sweet and hopeful smile．
| A．what | B．that | C．which | D．when |
On the wall hung a picture,__________ colour is blue．
| A．whose | B．of which | C．which | D．its |
He lived in London for 3 months, during ______ time he learned some English．
| A．this | B．which | C．that | D．same |
__________ has already been pointed out, grammar is not a set of dead rules．
| A．As | B．It | C．That | D．Which |