This is the biggest lab_____ we have ever built in our university.

This is the biggest lab_____ we have ever built in our university.

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

 This is the biggest lab__________we have ever built in our university.

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

This is the biggest lab__________we have ever built in our university.

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

 This is the biggest lab ______ we have ever built in our university
A which  B what  C that   D where