________ about wild plants that they decided to make a trip to Madagascar for further research.

1. A.
   So curious the couple was
2. B.
   So curious were the couple
3. C.
   How curious the couple were
4. D.
   The couple was such curious

______ about wild plants that they decided to make a trip to Madagascar for further research.

　　A. So curious the couple was

　　B. So curious were the couple

　　C. How curious the couple were

　　D. The couple was such curious

_______about wild plants that they decided to make a trip to Madagascar for further research.

A.So curious the couple was

B.So curious were the couple

C.How curious the couple were

D.The couple was such curious

______ about wild plants that they decided to make a trip to Madagascar for further research

A. So curious the couple was              B. So curious were the couple

C. How curious the couple were            D. The couple was such curious

_______ about wild plants that they decided to make a trip to Madagascar for further research..

       A．so curious the couple was                    B．So curious were the couple

       C．How curious the couple were                D．The couple was such curious