1 was sitting, thinking, opened, hadn't seen, entered
2 came, were having, was, had seen
3 saw, was leaving
4 hadn't seen, met
5 had left, had time
6 told, had learnt
7 entered, took, went
8 were, was writing, was reading
9 didn't tell, had received
10 asked, knew, lived, said, didn't know
11 asked, could give
12 said, had given
13 asked, had put
14 told, had spent
15 felt, wanted
16 thought, had already gone
17 found, was talking, was standing
18 spoke, had never heard