We haven't discussed yet________we are going to place our new furniture.

A. that        

B. which 

C. what          

D. where

It is uncertain________side effect the medicine will bring about，although about two thousand patients have taken it.

A. that      

B. what 

C. how        

D. whether

When the news came ________ the war broke out, he decided to serve in the army. 

A．since               

B．which  

C．that                

D．because

Modern science has given clear evidence ________ smoking can lead to many diseases.

A．what            

B．which   

C．that             

D．where

I'd like to start my own business—that's ________I'd do if I had the money.

A．why 

B．when

C．which 

D．what

I'm afraid he's more of a talker than a doer, which is ________ he never finishes anything.

A. that 

B. when

C. where 

D. why

It is not always easy for the public to see  ________ use a new invention can be of to human life.

A．whose                                   

B．what

C．which                                 

D．that

Our teachers always tell us to believe in________ we do and who we are if we want to succeed.

A．why　　　　

B．how

C．what　　　　

D．which

The shocking news made me realize ________ terrible problems we would face.

A. what 

B. how

C. that 

D. why

His writing is so confusing that it's difficult to make out________ it is he is trying to express.

A．that         

B．how  

C．who        

D．what