Tony showed me his new cell phone,  _______  was small but it could change colors in different weather.  
#4967
A
the screen of whom
B
whom the screen of
C
which the screen of
D
the screen of which
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  _____ , you need to give all you have and try your best. 
#4941
A
Being a winner
B
To buy a winner
C
Be a winner
D
Having been a winner
  Can you tell me ______ that the 29th Olympic Games will take place?
#4620
A
it is when
B
when is it
C
when is
D
when it is