The manager spoke highly of such ___________ as loyalty, courage and truthfulness shown by his employees.
| A．virtues | B．features | C．properties | D．characteristics |
He wrote a letter __________ he explained what had happened in the accident.
| A．what | B．which |
| C．where | D．how |
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Ellen was a painter of birds and of nature，__________，for some reason, had withdrawn from all human society.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 |