Oncetherewasaparrotonsaleinapetstore.Itwasabeautifulredandbluebird.Itsatonaperchinthemiddleofthestoresothateveryonecouldseeitwhentheycamein.Theownerwasveryproudofitandaskedahighpriceforit.
Onedayamanwentintothestore."That'sabeautifulbird"hesaidtothepetstoreowner"Butwhyisitsoexpensive?Isitunsualbird?"
"Noit'snotveryunusual.It'sexpensivebecauseitcantalk"thepetstoreownersaid.
"Isee.HowcanImakeittalk?"themanasked.
Thepetstoreowneraskedhim"Doyouseethosestringtiedtoeachofthebird'slegs?"
"Yes"themananswered.
"Wellyoupullthosestrings"thepetstoreownertoldhim."Thatwillmaketheparrottalk."
Themanasked"DoyoumindifItry?"
"Notatall"thepetstoreownersaid.
Themanwalkeduptotheparrotandpulledthestringonitsleftleg.Theparrotsaid"Goodmorning."
Themanpulledthestringontheparrot'srightleg.Thistimetheparrotsaid"Howareyoutoday?"
"That'snotveryinteresting"saidtheman."Anyparrotcoulddothat."Thenhelaughed"ButwhatwoldhappenifIpulledbothstringsatthesametime?"
"I'llfalloffmyperchyoufool!"theparrotsaid.
【小题1】Theparrotwasexpensivebecause________.