There is a big library in our school. There are more than twice __________ five years ago.
| A．books than | B．many books than |
| C．as many books as | D．as books as |
She brought in her three friends, none of __________ I had ever met before.
| A．them | B．who |
| C．whom | D．these |
Ellen was a painter of birds and of nature，__________，for some reason, had withdrawn from all human society.
| A．which | B．who |
| C．where | D．whom |
The prize will go to the writer __________ story shows the most imagination.
| A．that | B．which |
| C．whose | D．what |
The road conditions there turned out to be very good，__________ was more than we could expect.
| A．it | B．what |
| C．which | D．that |
John invited about 40 people to his wedding, some of __________ are family members.
| A．them | B．that |
| C．which | D．whom |