She _______ (work) as a designer for 15 years. - has worked / has been working, Where are the kids? - They ________ (play) hide and seek outside all day. - have been playing, They ________ (do) the project for 3 month. They're not likely to finish soon. - have done/have been doing, I ________ (know) Michelle since high school. She's my best friend. - have known, Where are you? I _____ (wait) for an hour! - have been waiting, He _________ (write) the report for 3 days, but he hasn't finished. - has been writing, We _________ (study) law since September. - have studied / have been studying, How long _______ (you/stay) in France? - have you been staying,

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