02-08-37

Only with early seventeenth-century observers did the music of the original inhabitants of the United States and Canada entered recorded history.

答案：D

这句话怎么读不通？知道是倒装，但还原不回去。observers在这里好像多余

还原：Only with early seventeenth-century observers ，the music of the original inhabitants of the United States and Canada entered recorded history.

仅仅因为17世纪早期的observers（要根据上下文来翻译），美国原著民的音乐进入唱片时代。