Fill in was, were, wasn't, weren't
1. the children at home yesterday morning?
2. No, they . They at the zoo.
3. I at the zoo with my mum.
4. These flowers are beautiful. they expensive?
5. Sam at school yesterday.​

1. Were the children at home yesterday morning?

2. No, they weren't . They were at the zoo.

3. I was at the zoo with my mum.

4. These flowers are beautiful. Were they expensive?

5. Sam was at school yesterday.

Объяснение:

Were, was - это глагол "быть" ("be") в форме.

Weren't, wasn't - это тоже самое только в отрицательной форме

He, She, It, I - was, wasn't

They - were, were not