．Canada second to Russia in size is home to all kinds of animals and plants making it

问题补充：

．Canada, second to Russia in size, is home to all kinds of animals and plants, making it famous for its natural scenery.

A. 不填，a

B. the, the

C. the, 不填

D. 不填，不填

答案：

A. 不填，a

B. the, the

C. the, 不填

(答案→)D. 不填，不填

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