We are past the period of evolution when only the fittest can______.
A.endure
B.function
C.remain
D.survive

A.A.endure
B.function
C.remain
D.survive

【参考答案】

D
解析：本题考查动词辨析。选项A．endure是“忍耐”；选项B．function是“工作、运行、起作用”；选......

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