| David opened his mouth to tell the story, then couldn't remember whether he'd already told it and didn't want to be scolded for perseverating. |
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| Anyway, tell your daughter to forget about perseverating over standardized testing. |
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| So you get people perseverating on things, and if you sit down at a computer terminal you can go for hours and hours. |
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| Ben goofed around in the water, perseverating on the names of other kids in the pool. |
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| After perseverating for several more months, Woodrow Wilson accepted the offer. |
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