Нужно вставить was или were, помогите плизз))

Question

Нужно вставить was или were, помогите плизз))

---

Answer 1

1 was
2 was
3 were
4 were
5 was
6 was, was
7 were
8 was
9 were
10 was, were
11 were
12 was
13 was
14 was
15 was
16 were
17 wasn't, was
18 were, was
19 were, was
20 was

Answer 2

Was - единственное число (I, he, she, it или слово БЕЗ окончаний -s, -es и т.д.).
were - множественное число (We, you, they или C окончаниями -s, -es).