单选题
Previous research has established the lupine wolf as the______of the modern canine, but when and where humans first domesticated the former into the latter remains unclear.
(A) competitor
(B) ally
(C) scion
(D) prey
(E) progenitor
A
B
C
D
E
【正确答案】
E
【答案解析】
提交答案
关闭