#2
1.is; 's
2.are; 're
3.is; 's
4.are not; aren't
5.am not; amn't
#3
are they cooking?
no,they aren't
they are reading(waiting);
are they skiing?
no,they aren't
they are swimming;
are they dancing?
yes,they are
they are dancing
Is it flying?
Yes,it is
It is flying