=>
1.When I arrived at his house, he still was sleeping
2. The light went out while we were having dinner.
3. Bill (have) breakfast when I (stop) at his house this morning.
=> was having/ stopped
4.I was very tired because I was working all day yesterday.
5. think/is knocking
6.have written
7.are working
8.have lived
9.hasn't been/ has been living
10.. wasn’t doing/came