________ I prefer a color TV, I have decided to buy a black and white one this time．

1. A.
   When
2. B.
   Although
3. C.
   Because
4. D.
   If

_____ I prefer a color TV, I have decided to buy a black and white one this time.

　 A．When　　　　 B．Although　　 C．Because　　　 D．If

________ I prefer a color TV, I have decided to buy a black and white one this time.

[　　]