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True / False. Tools
EduBook Organización
- 2266 visitas
Are these sentences true or false? A tool is an instrument that we use to make our work easier. We operate tools using our hands. Humans used rocks, bones and sticks to make the first tools. When humans…
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Self-assessment T10 08 - Machines and structures
EduBook Organización
- 2262 visitas
Complete the text with the correct words: A is an instrument that we use to make our work easier. We operate tools using our . Humans used , bones and sticks to make the first tools. These included…
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The third conditional
EduBook Organización
- 2207 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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Self-assessment T10 06 - Machines and structures
EduBook Organización
- 2208 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
- 2461 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
- 1979 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
- 1920 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
- 1870 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
- 1866 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…
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