The Koala is ____ tree-climbing animal which lives in ____ Australia.

A. a, the     B. the, the       C. 不填，不填        D. a, 不填

The Koala is ____ tree-climbing animal which lives in ____ Australia.

A. a, the     B. the, the       C. 不填，不填        D. a, 不填

The Koala is ____ tree-climbing animal which lives in ____ Australia.

A. a, the     B. the, the       C. 不填，不填        D. a, 不填

The Koala is ____ tree-climbing animal which lives in ____ Australia.

A. a, the　　 B. the, the　　　 C. 不填，不填　　　 D. a, 不填

The Koala is      tree-climbing animal which lives in      Australia.

       A．a, the                 B．the, the                C．不填,不填           D．a, 不填