This is the mountain ______ the top is always covered with snow.
| A．of what |
| B．of which |
| C．whose |
| D．that |
The boy ______ composition won the first prize is the youngest in the group.
| A．who |
| B．which |
| C．what |
| D．whose |
This is the very room ______ I slept in that evening.
| A．that |
| B．which |
| C．where |
| D．at which |
We talked about the things and persons ______ we remembered at school.
| A．which |
| B．what |
| C．whose |
| D．that |
John said he’d been working in the office for an hour, ______ was true.
| A．he |
| B．this |
| C．it |
| D．which |