The painting is so valuable that it is difficult to calculate ________ its price would be if the museum wanted to sell it．

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

The painting is so valuable that it is difficult to calculate　 its price would be.

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

The painting is so valuable that it is difficult to calculate　 its price would be.

A.that　　　 B.which　　　　 C.what　　　　 D./

This painting is so valuable that it is rather difficult to calculate _______ its price would be if the museum _______ to sell it.

A. how much; would want                 B. what; wanted    

C. what; wants                              D. how much; wants