.Many wild animals in the world , so we must take measures to protect them.A．are dying outB．have died outC．died outD．die out 题目和参考答案——青夏教育精英家教网——

题目内容

.
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

A

略

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