1 came, had already cooked
2 returned, had already done
3 entered, had already opened
4 gave, had bought
5 shown, had drown
6 gave, had brought
7 saw, hadn't washed
8 understood, hadn't done
9 knew, hadn't come
10 returned
11 had returned
12 finished
13 had finished
14 though, had lost
15 told, had seen
16 woke, had already gone
17 though, hadn't come
18 told, had cooked
19 found, have lost
20 came, had already left