It was quite a long time ______ he really realized the serious situation.
| A．since | B．when | C．after | D．before |
The college student lost his life trying to save the drowning child, ________ he will always be remembered.
| A．in which | B．about which |
| C．by which | D．for which |
That man is the richest ________ pleasures are the cheapest.
| A．whose | B．where |
| C．when | D．which |
The Charles Dickens Museum in Doughty Street is the only one of his London homes to survive, ________ he wrote Oliver Twist.
| A．where | B．that |
| C．which | D．what |
In South Africa, English is the language ________ black parents wish their children to be educated.
| A．for which | B．that |
| C．in which | D．when |
—Where did you have the discussion with Professor Snow?
—It was in the classroom ________ we had a biology lesson yesterday.
| A．which | B．when |
| C．that | D．where |