.As is known to all tiger is in danger of dying out.A. a; aB. the; /C. a; /D. the; the

问题补充：

.As is known to all, tiger is in danger of dying out.

A. a; a

B. the; /

C. a; /

D. the; the

答案：

A. a; a

(答案→)B. the; /

C. a; /

D. the; the

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