Answer:
1) got, invited
2) just posted, will receive
3) brushed, opened
4) didn't finish, were still washing
5) will become, will do
6) will paint, just asked, will have
7) played, saw
8) was, waited
9) dust, tidy
10) went
11) comes, takes
12) will have to, will have to cross
13) goes, stays, takes care
14) just took, we will
15) is using, will not
16) were singing, played
17) are playing
18) brush, wake, wash
19) was, wanted
20) was, won