Bob suddenly changed his mind just as we were about to __________ for the train station, which made me very angry.
| A．set off | B．make up |
| C．put off | D．queue up |
I have bought two ballpens，________ writes well.
| A．none of them | B．neither of them |
| C．neither of which | D．none of which |
Is ________ some German friends visited last week?
| A．this school | B．this the school |
| C．this school one | D．this school where |
Is there anyone in your class ________ family is in the country?
| A．who | B．who's | C．which | D．whose |
The engineer ________ my father works is about 50 years old.
| A．to whom | B．on whom |
| C．with which | D．with whom |
They arrived at a farmhouse，in front of ________ sat a small boy.
| A．whom | B．who | C．which | D．that |