He is _____ a sandwich., eating, eatting, They are _____ lemonade., drinking, drinkking, He is _____ dinner for his family., cooking, cookking, He is _____ a book by the fireplace., reading, readding, She is _____ for her exams., studying, studing, She is _____ in the pool., swiming, swimming, She is _____ a letter to her friend., writeing, writing, The athletes are _____ a race., runing, running, She is _____ a math class., teaching, teachhing, They are _____ to music., listenning, listening.

Verbs. -ing

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