填空题

We are rapidly near the end of this course in the history of (S1)____________music. We have covered several centuries in a very short time. Much too short to do the music (S2)____________, of course, but then this year is the (S3)____________course. From now until the end of the term, we’ll be talking about and listening to (S4)____________music. You probably already know that it was in the 1950’s that musical (S5)____________and synthesizers first appeared in university. The first (S6)____________synthesizers were sold about this time, too. The (S7)____________and complexity of these instruments have now increased to the point they can produce almost any kind of sound. (S8)____________. You know I don’ t share this view, but I do agree we are in the midst of a revolution in instrument design. (S9) ____________. Remember we’ re already studied a similar case in the early nineteenth century when the piano replaced the harpsichord and modern brass and wind instruments came into being. (S10)____________Well, just look at it. Only about 400 dollars for an electronic keyboard compared to nearly 3000 dollars for a piano. Naturally, this has done a lot to increase sales of electronic instruments. But I don’ t think even the most ardent supporters of electronic instruments expect them to completely replace acoustic instruments. S10