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

Tell me the day.................. you want to leave.
A.which 
B.when
C.in that                  
D.where

Red roses are romantic- they are my favorite.............
A.grass
B.flower           
C.beach
D.tree

Have you ever visited New York habor.................. the famous Statue of Liberty stands?
A.on where                     
B.that
C.on that                  
D.where