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both; and so; that enough ; to too; to
how to do it how to do what to do it where to do it
mustn’t can’t may not won’t
hadn’t thought haven’t thought didn’t think wasn’t thinking
easily usually loudly quietly
easily easy difficult hard
hard; hardly hardly; hard hard; hard hardly; hardly
so；that very；to enough；to too；to
easily usefully loudly quietly
easily usefully loudly quietly
so hard a ; a few so hard a ; few
such hard a ; few such a hard ; a few
have been working worked have worked work
work at it work it on work out it work it out
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