<閱讀測驗>第49至52題為題組 51. According to the passage， why did the glass armonica lose its popularity? (A) The skill of playing the glass armonica was very hard to master. (B) Famous musicians like Beethoven had problems composing for it. (C) Concert halls became too big for its music to be heard by the audience. (D) Reviewers in that time indicated that it was clumsy and not fashionable.
