IN ORDER TO SAVE ELECTRICITY, AN ORDINARY 100 WATT LIGHT BULB CAN...

19. - TRAC NGHIEM ANH 9 UNIT 67
TRAC NGHIEM ANH 9 UNIT 67

19. In order to save electricity, an ordinary 100 watt light bulb can be replaced by……….( an

energy-saving bulb / a 1000watt light / an electric bulb/ a lamp )