(2011·重庆)It is still under discussion ________ the old bus station should be replaced with a modern hotel or not.

A．whether  B．when  C．which  D．where

The limits of a person's intelligence，generally speaking，are fixed at birth，but ________ he reaches these limits will depend on his environment.(2011·安徽)

A．where  B．whether  C．that  D．why

We've offered her the job，but I don't know ________ she'll accept it.(2011·山东)

A．where  B．what  C．whether  D．which

It doesn't matter ________ you pay by cash or credit card in this store.(2012·山东 )

A．how  B．whether  C．what  D．why

Believe it or not，I'm sure that is ________ people call the six sense.

A．when  B．what  C．which  D．why

Meals in Spain are quite different from ________ they have in China.

A．which  B．what  C．that  D．whom

________ seems to be a strong competition in China for senior high students to enter universities does exist in other countries as well.

A．It  B．Which  C．What  D．That

Before the problem can be solved，it must be obvious ________ the problem itself is.(2011·湖南，31)

A．what  B．that  C．which  D．why

His writing is so confusing that it's difficult to make out ________ it is he is trying to express.(2011·安徽，33)

A．that  B．how  C．who  D．what

It is by no means clear ________ the president can do to end the strike.(2012·新课标全国)

A．how  B．which  C．that  D．what