What is missing? Put the sentences into the correct groups.

• Группы
  • am
  • is
  • are
• Варианты
  • I ... at school.
  • My father ... a teacher.
  • I ... a pupil.
  • I ... nine years old.
  • It ... a bird.
  • The bird ... black.
  • My pencils ... in the school bag.
  • The children ... happy.
  • My sister and I ... in the garden.