Escribe antes de cada nombre:

This is a or this is an.
1.- This is a book.
2.- This is an umbrella.
3.- This is a table.
4.- This is an apple.
5.- This is a house.
6.- This is a student.
7.- This is a piece of chalk.
8.- This is a honest man.
9.- This is an uniform.
10.- This is a notebook.
11.- This is an elephant.
12.- This is a man.
13.- This is a woman.
14.- This is a chair.
15.- This is an orange.
16.- This is a desk.
17.- This is an university.
18.- This is a teacher.
19.- This is a box.
20.- This is a house.
21.- This is an insect.
22.- This is a pencil.
23.- This is a hour.
24.- This is a blackboard.