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the telephone rang Anna heard the telephone ring someone knocked at the door there was a knock at the door
knocks to knock knocked knocking
knock knocking knocked to knock
was knocking at knocked knocked at knock at
is; knocking is; knock are; knocking are; knock
knock knocking knocks to knock
to have heard to be heard to be hearing having heard
had interrupted would have interrupted to have intrrupted to intrrupt
had I gone；someone knocked at I had gone；did someone knock at had I gone；did someone knock at did I go；someone knocked at
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