Read the text in front of a mirror. Start with an angry attitude, then be concerned, and finally, act sad.
“Although child labour has been greatly reduced in the last twenty years, there are still 218 million children going to work worldwide. That is, one in seven children … Surprisingly children are still employed in mining and agricultural work. This is heartbreaking.”
You can read but your tone is rather monotonous.
You played your role but some words were not stressed enough.
You gave a perfect speech!