1.  There's ---- ∅ a an the bed in this room.

2.   ---- ∅ A An The only bed in this room has a green cover.

3.  People usually sleep on ---- ∅ a an the beds.

4.   ---- ∅ A An The cats like to catch mice.

5.   ---- ∅ A An The cats in our village are all black and white.

6.  I have ---- ∅ a an the question to ask you.

7.  He is ---- ∅ a an the firefighter.

8.  I am ---- ∅ a an the citizen of Poland.

9.  Billy has got ---- ∅ a an the new girlfriend.

10.  Who is ---- ∅ a an the boy standing under that tree?

11.   ---- ∅ A An The parents love their children.

12.   ---- ∅ A An The fathers of the children in this school are interested in their children's education.

13.  Do you think ---- ∅ a an the mice are beautiful?

14.  She fell in love with ---- ∅ a an the boy next door.

15.  You are ---- ∅ a an the good doctor.

16.  Give me half ---- ∅ a an the hour.

17.   ---- ∅ A An The door is still open. Please close it.

18.  He has ---- ∅ a an the new bike.

19.  He doesn't like sleeping on ---- ∅ a an the floor.

20.  This is ---- ∅ a an the interesting problem.