—I wonder       .     —Zebras.

    A. what do they call these animals    B. how they call these animals

    C. what they call these animals         D. how do they call these animals

–---I wonder __________.    –--Zebras.

A. what do they call these animals      B. how they call these animals

C. what they call these animals         D. how do they call these animals

--- I wonder __________.

--- Zebras.

A. what do they call these animals            B. how they call these animals

C. what they call these animals                   D. how do they call these animals

–---I wonder __________.　　

–---Zebras.

A. what do they call these animals　　　　 B. how they call these animals

C. what they call these animals　　　　　　 　 D. how do they call these animals