3. Choose the correct answers. The light bulb
What would we do without electric lights? In the 1800s, light bulbs ' _by
different people, but none of them were good enough to sell until the right
material to go inside the bulb?
— Thomas Edison. Since then, electric lights
- around the world by billions of people.
The original designº— much, although more energy-efficient light bulbs
now in many parts of the world. However, in some countries, people can't
afford to use electricity. This fact encouraged U.S. teenager Ann Makosinski
to invent a new kind of light. This light ® __by electricity. It uses body heat
instead. But '_replaced by this new invention in the future? Probably not, but
light — and so this invention could definitely become popular in many parts
of the world.

1. a) are developed b) developed c) were developed d) is develop
2. a) were discovered by b) was discovered c) was discovered by d) were discovered
3. a) have used b) have been used c) have be used d) have use
4. a) isn't changed b) won't change c) hasn't been changed d) hasn't be changed
5. a) will be bought b) is bought c)are bought d) were bought
6. a) isn't powered b) wasn't powered c) hasn't powered
d) not powered
7. a) will be the light bulb b) will the light bulb be c) will the light bulb d) the light bulb
8. a) will be always needed b) always will be needed с) will be needed always d) will always be needed

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ЮляЯяя1111

Английский язык

4,8(61 оценок)

How leaped paint colorful lights over our house. yes shaggy ran up to the top of the roof rays. know everything! marvelous time to come. how i love the summer heat, drizzle in the evening and picnicking outdoors. i can say one thing: no matter how big did not seem our family, we will always be there, and our hearts will never cease to beat. love and affection - that's what makes us closer! tell you an interesting story. it happened once all the family to visit at a party with friends. their house was on the edge of the forest. because of the thick branches of trees to be seen inhabitants of the forest. they are probably afraid of the "guests from the province." their hut was not on chicken legs and conventional brёvnyshkah.god, how everything is beautiful! divine cedar smell wafting from a wooden hut, turn our heads. we were very pleased to find himself again here. good-natured, friendly hosts widely open to us dragged upward secular boron door. and then, out of the blue, open the doors of crept curly head cheerful children. these were their children. joyous greeting continued inside the cabin. hostess baked in the oven rosy cakes with strawberries, which recently tore their children near the house. his little wife invited us for a large table, which was strewn with ornate dishes.

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