Раскройте скобки, употребляя глаголы в Present Continuous или Past Continuous.

1. I am writing an English exercise now. I was writing an English exercise at that time yesterday. 2. My little sister is sleeping now. My little sister was sleeping at that time yesterday. 3. My friends are not doing their homework now. They are playing volleyball. 4. My friends were not doing their homework at seven o’clock yesterday. They were playing volleyball.