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An example of an artificial light source is ( light, Moon ).
light
A ( nonluminous, luminous ) object produces or gives off light.
luminous
To ( give off, vibrate ) means to move back and forth.
vibrate
An example of a loud sound is a ( shout, whisper )
shout
Yes or No? Wear oven gloves in removing hot pans from the oven.
Yes
Yes or No? Keep the television on, even when it is not in use.
No
Yes or No? The sound of music is pleasant to the ears.
Yes
Yes or No? We should always speak in a moderate voice.
Yes
Yes or No? All sounds are loud.
Yes
Yes or No? Keep the refrigerator open at all times.
No
( An artificial, A natural ) light source is a man-made object that gives off or reflects light.
An artificial
Yes or No? Use energy-saving bulbs.
Yes
Yes or No? Touch hot objects directly using your hands.
No
