Ребят, я снова к Вам за помощью.

Correct the underlined words in the sentences.

Example:
What are this? What is this?
These are a car. This is a car.

1 What colour is those? _____________
_
2 These is very beautiful. ___________
_
3 Are that your house? ______________
_
4 These isn't very old. ________