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Learning Task 4: Choose the best answer. 1. Which items we need to use to light a buld? Pin b. leaf с. paper d. plastic 2. Which part of the bulb gives off light? a. Filament b. socket c. glass d. pin 3. Bulbs use electricity to make light. What else do lightbulb often give off? Heat b. cool c. none d. comfort 4. Which type of object is needed to complete the circuit? Conductor b. insulator c. none d. plastic 5. Which of them is not belong to the group? a. rubber b. metal c. gold d. aluminum ​