HAS BEEN, He .......... to Los Angeles, HAS LIVED, I.......... here for three years, SINCE, She's been an athlete ...... 2010, YET, Carlos hasn't bought a bike ........, EVER, Have you ....... tried skii?, NEVER, I've ......... been to USA, SOME, There are ........ paintings on the wall, WILL, Olivia ....... be an artist

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