And one that men and women twice and three times his age still have not learned.
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"We still have not had any official contact with the U.S. , " he said early Friday.
We are still at a period where we still have not seen consistent positive job growth.
"My frustration is that people still have not returned to New Orleans, " Ocker told CNN.
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Is he disappointed that most states still have not signed on to this thing?
The recent events in Washington still have not turned poll respondents off from the established political parties.
But it teaches vocational skills that many college graduates still have not learned.
Meanwhile, those who still have not chosen between the two candidates will be voting with their wallets in November.
Three weeks after the tsunami, they still have not gained control of the situation, and it still could get worse.
However, the Welsh government is increasingly frustrated that UK government ministers still have not formally responded to the Silk report.
To date I have worked over 50 hours and still have not been paid by either the towncar company or Uber.
But Michael Jackson's three children still have not heard from their grandmother, eight days after she left them at home, Ribera said.
Some of England's schools still have not had their test results returned to them, as the first postponed deadline for appeals passes.
Because of that the show has not changed and, he says, many basic issues facing the people still have not been addressed.
Goldman Sachs and Morgan Stanley are still making money hands over fist, yet they still have not reined in their dangerous leverage practices.
And we still have not seen the kinds of participation levels that are necessary to match up the numbers with actual political power.
Reports said Greece private sector and government talks on debt restructuring have made some progress but still have not come to a complete resolution.
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Also of note: evidence that Democratic leaders in New York still have not reached a consensus on a nominee in what remains an open primary contest.
They still have not ruled out joining the euro currency.
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The United States is one of the few countries left in the world who still have not converted to using the Metric System as a standardized system of measurement.
According to some surveys, up to 40% of Germans still have not made up their minds about how they will vote, so there remains a lot to play for.
Despite this, PHW said large numbers of people aged 10-18 years still have not had a jab which could prevent them from contracting measles, a highly contagious and potentially fatal disease.
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Reports said Greece private sector and government talks on debt restructuring have made some progress but still have not come to a complete resolution, with patience growing thin among the participants.
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Five years later, they still have not been resolved.
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What we still have not seen from the Republicans is a willingness to do the kinds of things that will substantially add to economic growth and job creation in the near term.
War veterans have repeatedly said they only take orders from Mr Mugabe, but they too are becoming increasingly frustrated and angry that, a month after the elections, they still have not been given the land they were promised.
And they're saying that the UN and the Afghan government are worried about the political sensitivities of, if you like, naming and shaming these individuals, and highlighting again alleged war crimes, which still have not been dealt with in Afghan society.
These are questions I have still not seen answered, much as I have not seen compelling data to show that the millions upon millions of video game players and viewers of film and television have been turned into psychopaths.
The small percentage of schools that have still not yet had all their results do not have to lodge appeals until 10 days after finally receiving them.
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