Many have heard it, but nobody has ever seen it. It will not speak back until spoken to. What is it? The answer to the riddle is an echo. Echo is the reflection of the sound that when it is released by the speaker, it arrives back to the speaker (now listener) but is delayed.
<span>Complete the proverbs, and then emphasize in each of them the main relationship, note which part of the sentence was missing in the individual statements</span>
