What/you/do / at 9 a.m. / yesterday?
What did you do at 9 a.m. yesterday?
He/drive/it/ sudden / rain / heavy.
He drove it when the heavy rain suddenly came.
We / camp/by/ river / we/ hear / emergency warning / of /flood.
We were camping by the river when we heard the emergency warning of the flood.
1/ sleep / while / sister / do gardening / yesterday afternoon.
I was sleeping while my sister was doing gardening yesterday afternoon.
They/sit/ rooftop / their house / when / rescue workers / appear.
They were sitting on the rooftop of their house when the rescue workers appeared.

1. What did you do at 9 a.m. yesterday?
2. He drove it when suddenly heavy rain fell.
3. We were camping by the river when we heard an emergency warning of a flood.
4. I was sleeping while my sister was doing gardening yesterday afternoon.
5. They were sitting on the rooftop of their house when the rescue workers appeared.