in the 1800s and first mass-produced in Germany, the harmonica was designed to p
来源：网络
时间：
推荐文章
_______ in the 1800s and first mass-produced in Germany, the harmonica(口琴) was designed to play simple folk tunes
A.Being invented
B.Inventing
C.Invented
D.Having invented
试题答案
C
考查非谓语动词。逻辑主语the harmonica与invent之间为被动关系，故用过去分，选C。