________(39)
A.earth
B.land
C.space
D.world

________(38)
A.resources 
B.features
C. natures
D. sources

________(37)
A.over
B.more
C. since 
D.less

________(36)
A.liked 
B. known 
C. seen 
D.heard

________(35)
A.whose 
B.when 
C.which 
D.where

As the roles of people in society change, so does the rules of conduct in certain situations.
A.As the roles
B.so does
C.rules of 
D.situations

He couldn’t rest or sleep because ____ too much coffee. 
A.drinking 
B.been drinking
C.had been drinking
D.he had been drinking

If orders keep coming in like this, I’ll have to ____ more staff. 
A. give up
B. add in
C.gain on
D.take on

Did you have an argument with Francis?” “If you had been there, you ____ the same.” 
A.did
B.would have done
C.had done
D.would be

You saved my life. I thank you from the ____ of my heart.
A.centre
B.bottom   
C.depths     
D. top