So many uses have been discovered for this wood ____ the supply of white pine is becoming smaller and smaller.

A. then       B. what    C. that   D. which

. So many uses have been discovered for this wood ____ the supply of white pine is becoming smaller and smaller.

A. then B. what    C. that   D. which

So many uses have been discovered for this wood ____ the supply of white pine is becoming smaller and smaller.

A. then     B. what    C. that   D. which

So many uses have been discovered for this wood ____ the supply of white pine is becoming smaller and smaller.

A. then　　 B. what　　　 C. that　　 D. which

So many uses have been discovered for this wood ____ the supply of white pine is becoming smaller and smaller.

1. A.
   then
2. B.
   what
3. C.
   that
4. D.
   which