Краткое пояснение: Добавляем окончание -ing к каждому глаголу.
0) play - playing
1) talk - talking
2) study - studying
3) put - putting
4) make - making
5) plan - planning
6) happen - happening
7) get - getting
8) help - helping
9) leave - leaving
10) fly - flying
11) listen - listening
12) come - coming
13) die - dying
14) swim - swimming
15) begin - beginning
16) sell - selling
17) cut - cutting
18) celebrate - celebrating
19) do - doing
Ответ: смотри решение выше