1 stayed
2 went
3 had
4 was
5 visited
6 were
7 bought
8 saw
9 ate
10 talked
11 returned
12 thought - was
13 worked
14 studied
15 travelled
16 watched
17 bought
18 thought - was
19 cooked
20 wrote
1) stayed
2) went
3) had
4) was
5) visited
6) were
7) bought
8) saw
9) ate
10) talked
11) returned
12) thought/ was
13) worked
14) studied
15) travelled
16) watched
17) bought
18) thought/ was
19) cooked
20) wrote