—I drove to Zhuhai for the air show last week.
—Is that__________you had a few days off?
| A．why | B．what | C．when | D．where |
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 |
The pen ________ he is writing is mine.
| A．with which | B．in which |
| C．on which | D．by which |