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Simple and compound machines
EduBook Organización
- 2381 visitas
Machines have several connected parts and work manually or with a motor. They save us time and effort. Simple machines Simple machines only have a few parts. The most common examples are the lever, the…
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The third conditional
EduBook Organización
- 2336 visitas
‘It would never have happened if I had not met you.’ ‘It would never have happened if I had not met you.’ The third conditional is used to talk about something in the past which cannot be…
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Video: A Cyber Bullying Suicide Story
Esl video Organización
- 1 lo usan
- 3262 visitas
This 4:30 minute video tells the story of a teenager who committed suicide because he was repeatedly humiliated at school and over the internet. His father gives speeches in schools to encourage…
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Self-assessment T10 06 - Machines and structures
EduBook Organización
- 2305 visitas
Are these sentences true or false? Levers are compound machines which are made up of three elements: the load,the effort and the fulcrum. In first-class levers, the fulcrum is located between the effort…
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Video: How can cookies make your surfing experience convenient?
Tiching explorer Organización
- 2553 visitas
Cookies are convenient because they make it easier to gather information about the web surfing history of a visitor and provide a better user experience. In this 2 minute video, we’ll see what cookies…
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Understanding the text Ch 2 05
EduBook Organización
- 2053 visitas
Look at this sentence: King Richard was unable to free Jerusalem. In English we often put the prefix ‘un’ before a word to mean ‘not’. Look at these examples: King Richard was not able to return…
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Chemical reactions
EduBook Organización
- 1997 visitas
What is a chemical reaction? Chemical reactions are processes that turn certain substances into other substances. These are the products of the reaction. Heat is sometimes a product of the reaction.…
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Past continuous and past simple
EduBook Organización
- 2012 visitas
While + the Past Continuous Look at these examples: Virginia (talk) to the Ghost (long action) + She (become) angry (sudden action) While Virginia was talking to the Ghost, she became angry. She (come)…
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Past continous
EduBook Organización
- 2001 visitas
Past Continous One Christmas Eve Scrooge was sitting in his office. The verb was sitting is in the Past Continuous (Past Simple of to be + present participle) and describes the continuation of an action…