It vs this / They vs these

1 . What is ____________________ ? ____________________ a strawberry .
2 . What color is the apple ? ____________________ is red .
3 . Are these your shoes ? No , ____________________ aren't my shoes .
4 . Are those grapes ? No , ____________________ aren't grapes .
What are they ? ____________________ blackberries .
5 . Is that my notebook ? Yes , ____________________ is your notebook .
6 . Look at the sky ! Are ____________________ stars ? Yes , they are stars .