33. What does the word improvising mean in the above passage?
(A) Compose music while playing
(B) Playing music while singing
(C) Tune up the instruments before playing
(D) Hum music while thinking
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統計: A(30), B(7), C(6), D(2), E(0) #1219783
統計: A(30), B(7), C(6), D(2), E(0) #1219783