As is well known, the brain performs a very important _______, which controls the nerve system of the body.
| A．motion | B．action | C．function | D．fact |
In our factory there are 2,000 workers, two thirds of ____are women.
| A．them | B．which | C．whom | D．who |
He talked a lot about things and persons ________they remembered in the school.
| A．which | B．that | C．whom | D．what |
I want to use the same dictionary ______was used yesterday.
| A．which | B．who | C．what | D．as |
They arrived at a farmhouse, in front of ______sat a small boy.
| A．whom | B．who | C．which | D．that |
The pen ______he is writing is mine.
| A．with which | B．in which | C．on which | D．by which |