It was how the young man had learned five foreign languages _________ attracted the audience’s interest．

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

It was how the young man had learned five foreign languages________________ attracted the audience’s interest.

A.　　  so that　　  　　　　　　   　　　　　　   　　   

B.　　  that

C.　　  what　　    　　　　　　   　　　　　　  

D.　　 in which

A.　　  so that　　  　　　　　　   　　　　　　   　　   

B.　　  that

C.　　  what　　    　　　　　　   　　　　　　  

D.　　 in which

It was how the young man had learned five foreign languages ________ attracted the audience's interest.

[　　]

A．so that　　　　　　B．that

C．what　　　　　　　D．in which