What were you doing when you heard the scream?, I was watching tv, I watched tv, Per parlare di un'azione in corso di svolgimento nel passato si utilizza il present continuous, false, true, I am doing my homework when my brother called me., correct, incorrect, I ........................my homework when my brother called me., am doing, have doing, was doing, were doing, You were ........................ when I came home., sleep, sleeps, sleeping, They were ......................... lunch when I saw them., having, has, have, had.

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