.Many wild animals in the world so we must take measures to protect them.A. are dying o

问题补充：

.

Many wild animals in the world , so we must take measures to protect them.

A. are dying out

B. have died out

C. died out

D. die out

答案：

(答案→)A. are dying out

B. have died out

C. died out

D. die out

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