The field research will take Joan and Paul about five months; it will be a long time __________ we meet them again.
| A．after | B．before | C．since | D．when |
The boss ______ department Ms．King worked in ten years ago looked down upon women．
| A．in which | B．in that | C．whose | D．which |
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 |