1.

1) is singing

2) goes

3) has

4) does he do

5) Are you sitting

6) don't open

2.

a) What are you doing

b) I am sitting

c) Are they watching TV

d) Aren't

e) They are

f) Do you have

g) have

h) does he do

i) Is he studying

j) is

k) Are you coming

l) are coming