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If I received Should I receive Had I received If I could have received
write be writing have written be written
If I received Should I received Had I received If I could have received
had post，had arrived was posted，arrived posted，arrived had been posted，was arrived
Not until nekt week Until next week Afew days ago For a few days
If I could have received If I received Should I receive Had I received
two days ago in two days for two days between two days
have written write had written be writing
heard of heard from heard a letter from got from
Had I received Should I received If; could have received If I received
If I received Should I receive Had I received If I could have received
reach catch receive accept
hear a letter; got get; heard get a letter; heard hear; heard a letter
got will got have got get
two days two days before
two days ago yesterday
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