номер 1

1. Those

2. That

3. that

4. Those

5.this

6. this

7. These

8. Those

номер 2

these are spiders.

That is snails

this is a stars

this is a boys...

и т.д. , везде на конце существительных прибавляется окончание -s во множественном числе (в нашем случае так)

номер 3

it's a hat.

this is a car.

these are toys.

this is a pen.

this is pensel