ists across the world agree that thisis an invention of _______ great significance, _______ invention that willgreatly change human life.

While she _______TV, She heard a sound outside the room .

Studies show the electronic devices people have made much use of ________ music may be causing hearing loss in many people.

Recently I realized the fact that I can noworganize my own time, which ______.

Noise is unpleasant, _____ when you are trying to sleep