— Can I pay the bill by check?
— Sorry, sir. But it's the management rules of our hotel that payment ______be made in cash.
| A.can | B.need | C.will | D.shall | 
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 |