I love autumn when .............change color.
A.islands
B.rocks
C.trees
D.lakes

“Were you able to locate the person …….wallet you found?”
A.which
B.that his
C.whose
D.that’s

They expect that the new book will be bought by people….. interested in English history.
A.whom 
B.who are
C.who
D.they are

Since the global industrialization, the number of animal species ..................have become extinct or nearly extinct has increased.
A.which                          
B.when   
C.why 
D.whose

Of my students, Betty is only one..................has found a good job.
A.where 
B.that 
C.which 
D.whose

Everything…………I said is to help you get on well with your work.
A.what  
B.that
C.whose
D.when

Niagara is a famous ..................in North America.
A.mountain      
B.valley
C.waterfall      
D.cliff

I have two close friends, both of…………..are boys.
A.who
B.whom
C.that    
D.them

Hanoi, ………….I was born in, is very nice.
A.where
B.which
C.that    
D.B or C

That is the place .................. there used to be a monument.
A.where 
B.that  
C.why
D.for which