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
Well, on the day of his thirteenth birthday, Jangala from Central Australia had been travelling around the Tanami desert for a week and he had done it alone! Jangala did not take any food with him to walk in the desert, he ate small animals and snakes, he caught them with his boomerang and spear. He made small fires to cook his food. At nights he slept under the stars on the desert. In fact he showed that he was a good Warlpiri. When Jangala returned, his family celebrated his new status. He was happy. He knew that long ago the Warlpiri boys spent 6 months on Walkabout.
США граничат с двумя странами - Канадой и Мексикой.
В США много гор, рек, озер. Самые длинные реки - Миссисипи и Миссури.
Климат в стране разнообразный.
Америка состоит из пятидесяти штатов и одного федерального округа Колумбия, где расположена столица страны.
Столица США - Вашингтон.
Основные города расположены на тихоокеанском и атлантическом побережьях. Нью-Йорк самый большой город в стране.
США - страна с прекрасными праздниками, обычаями и традициями. Это одна из самых красивых и интересных стран в мире.