The Koala is tree-climbing animal which lives in Australia.A. a theB. the theC. 不填 不填D

问题补充：

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

答案：

A. a, the

B. the, the

C. 不填，不填

(答案→)D. a, 不填

解析：第一个空表示考拉熊是一种爬树动物，故用a；Australia为专有名词，前不用冠词.