用合适的形式填空。 1. The children _____________ (sleep) when the fire alarm _________ (ring) last night. 2. I _____________(read) a storybook when my mum _______ (come) into my room. 3. On Monday at 6:00 pm, Mary and I _____________ (have) dinner in a restaurant. 4. I _____________ (watch) TV with my family when you ________ (call) me. 5. Bob _____________ (do) martial arts in the gym when he _____ (hear) the exciting news. 6. We _____________ ( cheer ) at the park when the bells _____________ ( ring ) .