Question

Then make sentences.
We use this/these/that/those in the singular and this/these/that/those in the plural.
We use this/these/that/those in the singular
and this/these/that/those in the plural

Answer 1

Singular-ед число
plural-множ число
This и that-это единственное число.This-этот(эта,это )That-тот(та,то)
These -множ число от this,т.е эти
Those-множ число от that,т.е те
Т.е We use this,that in the singular and these and those in the plural