four years ( ) gone.中间用have还是has,..

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fouryears()gone.中间用have还是has,..fouryears()gone.中间用have还是has,..fouryears()gone.中间用have还是has,..have就对了

four years ( ) gone.中间用have还是has,..
four years ( ) gone.中间用have还是has,..

four years ( ) gone.中间用have还是has,..
have就对了