问题
选择题
_______ 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
答案
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。
