{{i}}quEstions 14 to 17 ArE BAsED on thE Following pAssAgE.At thE EnD oF thE pAssAgE, you will BE givEn 20 sEConDs to AnswEr thE quEstions. now listEn to thE pAssAgE.{{/i}}

whAt is thE mAin ConCErn oF tAlkA．how thE tonE oF A piAno is AFFECtED By its shApE.
B．how to mEAsurE A piAno’s rEsonAnCE.
C．how to improvE your pErFormAnCE By Choosing thE right piAno.
D．how sizE mAkEs A piAno morE ExpEnsivE.