单选题 Only A with early seventeenth century B observers did the music of C the original inhabitantsof the United States and Canada D entered recorded history.
【正确答案】 D
【答案解析】解析:entered改为enter。这里考察的是倒装句,句中的宾语为the music of the original inhabitants of the United States and Canada,谓语是enter,did后面应当跟动词的原形。