The new research center will be set up was a wasteland 20 year ago.
| A．in what | B．where | C．in which | D．there |
This is the school ____ we visited three days ago.
| A．where | B．/ | C．when | D．what |
This is the factory ____ we worked a year ago.
| A．where | B．that | C．which | D．on which |
Nearby were two canoes ____ they had come to the island.
| A．which | B．in which | C．that | D．/ |
Jack is pleased with ____ you have given him and all ____ you have told him.
| A．that, what | B．what, that | C．which, what | D．that, which |
Do you work near the building ____ colour is yellow?
| A．that | B．which | C．its | D．whose |