1. which of the following is not a keyboard instrument . a. piano . b. clavichord . c. tam-tam . d. harpsichord . 2. when was the modern piano invented? . a. about 20 years ago . b. about 100 years ago. c. about 300 years ago . d. about 1,000 years ago . 3. when a pianist pushes down a key on the piano keyboard, what happens to the string inside the instrument? . a. they are plucked by quills . b. they are struck by felt-covered hammers. c. they are struck by wooden sticks . d. they are pulled by bows strung with horse hair.