A nest is to a bird ______ a house is to a man.

A nest is to a bird ______ a house is to a man.

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

 A nest is to a bird  _____ a house is to a man.

   A. where            B. what              C. as if               D. how

A nest is to a bird 　　   a house is to a man.

A. where　　    B. how　　    C. what　　    D. when

A. where　　    B. how　　    C. what　　    D. when