She ______ a big cat. , isn't carrying, is carrying, I ______ a bike. , am not riding, am riding, They ______. , aren't swimming, are swimming, Lisa's sister _______. , isn't crying, is walking, The dogs _____ milk., aren't drinking, are drinking, We _______ the dishes. , aren't washing, are washing, Ben and Huy ______ baseball. , are playing, aren't playing, John's brother _______ skateboarding. , isn't, is.

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