—How much did you spend repairing your   computer?
—I don’t remember, _____ it was quite a lot.

A．but	B．or
C．for	D．so

Our English teacher Ms. White told us in her class _____ we should do something to stop water pollution at present in our city.

A．when	B．why
C．what	D．where

Almost every teenager will experience a period in their life _____ they aren’t satisfied with their parents.
A. which   B. where
C. why D. when

In most cases, college graduates don’t mind what job they will do as long as it is one _____ they can earn money to support themselves.
A. which   B. when
C. where    D. that

—Can you come and see me on Sunday, Daddy?
—Oh, daring, _____ I’m afraid that I’m already going on a business trip.

A．what a pity!	B．why not?
C．come on!	D．so what?