es Let Us Practice Encircle the model used in each sentence and write on the spaces provided in each item whether it expresses ability, aduce, certainty necessity or possibility: Ex. I can dance. Certainty 1. Fireworks of any kind must be handled with care. 2. A serious burn on any part of the body may leave an ugly scar. 3. To give the light desired, each ball should contain the proper element. 4. A chemist can explain the secret of its many-colored fire 5. You could recognize calcium by its red flame. 6. Sodium must be burned to make a deep yellow 7. The presence of copper ought to create green and blue. 8. Iron filings should be heated to create the bright white sparks of fireworks Without their benutiful colors, fireworks would not be interesting. 10. Fireworks could enliven fiestas and other celebrations Soume OHSP Recor​