问题
选择题
.
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
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.
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：A