单选题 Native to South America and cultivated there for thousands of years, the peanut is said to have introduced to North America by early explorers.

【正确答案】 D

【答案解析】答案：D 分析：introduce为名词peanut被动发出，因此要加be动词，而且前面有助动词have，所以应使用其过去分词been。改正：have introduced → have been introduced 翻译参考：原产于南美并在那里种植了数千年的花生，据说是由早期的开拓者带到北美的。