It is thought that modern corn may be a_________of teosinte and other wild species that no longer exist.

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问题 It is thought that modern corn may be a_________of teosinte and other wild species that no longer exist.

选项 A、hybrid
B、combination
C、compound
D、mixture

答案A

解析 A项hybrid 意为“(动植物)杂交”,B项combination 意为“结合”,C项compound意为“混合物(通常指化学上的)”,D项mixture意为“混合物”。句意:人们认为现代玉米可能是墨西哥类蜀黍和其他已不存在的野生品种的杂交,故选A。
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