She brought with her three friends, none of________I had ever met before.

A．them 

B．who

C．whom 

D．these

The British are not so familiar with different cultures and other ways of doing things, ________ is often the case in other countries.

A．what 

B．as

C．so 

D．that

Attention! Our bus is approaching Cambridge, ________ we'll be stopping to eat.

A．when 

B．which

C．as 

D．where

—Believe it or not, my sister and I are twins.

—Oh, you must have had the case ________ you were taken for your sister.

A．which 

B．whose

C．where 

D．whom

The first snow didn't fall until February in our province this year, ________ was unexpected.

A．it 

B．which

C．that 

D．what

Gun control is a subject ________ Americans have argued for a long time.

A．of which 

B．with which

C．about which 

D．into which

The settlement is home to nearly 1,000 people, many of________left their village homes for a better life in the city.

A. whom   　　　

B. which     

C. them    　　　

D. those

I've become good friends with several of the students in my school________I met in the English speech contest last year.

A. who 　　　  

B. where   

C. when  　　　

D. which

—Can you believe I had to pay 30 dollars for a haircut?

—You should try the barber's________I go. It's only 15.

A. as       

B. which

C. where       

D. that

That's the new machine________parts are too small to be seen.

A. that        

B. which 

C. whose      

D. what