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changed changing has changed will change
during President Kennedy's term fifty years later ten years ago last year from President Clinton
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since the last century for a very long time since a few hundred years ago since a few years ago
keep last remain continue
were have been has been was
had been were have been has been
were have been has been was
put through go through read through look through
come through go through cut through get through
Considering Regarding Supposing Providing
a few;give few;gave few;has given a few;would give
During annual repair Usually during dock repair Before sea trial After 5 years from last annual survey
changes has changed changed was changing