l saw them were sweeping the floor at that time

l saw them were sweeping the floor at that time The children were reading in the library.At that time I saw we were sweeping the floor.的被动语态 _____ they were sweeping the floor ,John came back The twogirls were frightensd at that time. I saw _____playing basketball on the playground at that time I saw ( ) playing in the street at that time When I saw them last time,they were working ___ the farm.A a were the twins in the classroom at that time? help do my sweeping housework can son mother floor his the l The students were watching TV at that time there were ______ people in the ship at that time.