English listening/choose what you hear!#shorts

What is the minimum distance between the reflector and the listener to hear the echo, when the speed of sound in air is 330 ms^(-1) ?

Try to imagine what you would feel, what short of person you would be, had you been born totally deaf.

When a bird flaps its wings, do you hear any sound ?

Arrange the given English words in alphabetical order and choose the one that comes first.