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A.was is will be had been
was, since been, after was, when has been, since
had enjoyed was enjoying enjoyed had been enjoying
When How far How long How soon
will be was have been would be
had enjoyed was enjoying enjoyed had been enjoying
was working has been working works worked
for two years ago since two years ago two years after since two years later
had worked have worked was working worked
learn learned will learn have learned
had enjoyed was enjoying enjoyed had been enjoying
opened has opened has been open has been opened
five years before five years ago for five years since five years
learn learned will learn have learned
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