Verified answer

1.

those books

this bag

these cars

those stars

that tree

this river

that computer

this apple

those flowers

2

2) that

3) these

4) Is this

5) this

6) those

7) Are these

8) Is that

9) this

10) This is my dog and that dog is his.

11) These

12) this

13) that (предмет в отдалении, поэтому "та звезда")

14) That

15) These

С сущ. в ед. числе используется this или that, а если сущ. во множ. числе - these или those