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547.Great changes ______ in my hometown in the past 20 years.
A.took place
B.have taken place
C.were taken place
D.have taken place
548.I want to buy that kind of cloth because I ______ the cloth ____ well.
A.have been told;washes
B.have told;washes
C.was told;washed
D.have been told;is washed
