Have you ever heard of the concept of an endless engine? It's a fascinating idea, essentially referring to a machine that could run forever without stopping. This engine would produce its own energy, making it self-sustaining. While it sounds like something out of a science fiction novel, scientists and engineers have been intrigued by the possibility for centuries.
The principle behind such a device is simple yet complex when it comes to actual implementation. Imagine not having to refuel a car or recharge your phone ever again. This could revolutionise the way we use energy, reducing our dependency on fossil fuels and helping combat climate change. However, there are significant hurdles to overcome. Laws of physics, such as the conservation of energy, suggest that an endless engine may be impossible to create.
Despite this, the pursuit of such a machine has led to many technological advancements. Renewable energy sources, like solar and wind power, are steps toward creating more sustainable energy systems. So, while the dream of an endless engine might remain unachievable for now, the quest itself continues to push human innovation forward.<\/div>"},{"lid":"1729866316983","ls":"100","loff":"","li_type":"rd","li_title":"1. The author introduces the concept of an endless engine.","li_req":"y","li_variants":"True\nFalse\nNot given","li_radcb":"rb","li_nm":"1. The author introduces the concept of an endless engine."},{"lid":"1729866366532","ls":"110","loff":"","li_type":"rd","li_title":"2. An endless engine would generate its own power, ensuring its sustainability.","li_req":"y","li_variants":"True\nFalse\nNot given","li_radcb":"rb","li_nm":"2. An endless engine would generate its own power, ensuring its sustainability."},{"lid":"1729867154302","ls":"120","loff":"","li_type":"rd","li_title":"3. Scientists and engineers have never been interested in the concept of an endless engine.","li_req":"y","li_variants":"True\nFalse\nNot given","li_radcb":"rb","li_nm":"3. Scientists and engineers have never been interested in the concept of an endless engine."},{"lid":"1729867179459","ls":"130","loff":"","li_type":"rd","li_title":"4. The author believes that the principle behind the endless engine will be easy to implement.","li_req":"y","li_variants":"True\nFalse\nNot given","li_radcb":"rb","li_nm":"4. The author believes that the principle behind the endless engine will be easy to implement."},{"lid":"1729867198197","ls":"140","loff":"","li_type":"rd","li_title":"5. Picture a world where cars and phones never need refuelling or recharging.","li_req":"y","li_variants":"True\nFalse\nNot given","li_radcb":"rb","li_nm":"5. Picture a world where cars and phones never need refuelling or recharging."},{"lid":"1729867225126","ls":"150","loff":"","li_type":"rd","li_title":"6. Physics laws indicate that creating an endless engine might be unattainable.","li_req":"y","li_variants":"True\nFalse\nNot given","li_radcb":"rb","li_nm":"6. Physics laws indicate that creating an endless engine might be unattainable."},{"lid":"1729867246389","ls":"160","loff":"","li_type":"rd","li_title":"7. Renewable energy sources do not contribute to sustainable energy systems.","li_req":"y","li_variants":"True\nFalse\nNot given","li_radcb":"rb","li_nm":"7. Renewable energy sources do not contribute to sustainable energy systems."},{"lid":"1729867264650","ls":"170","loff":"","li_type":"rd","li_title":"8. The author lists the hurdles to creating an endless engine.","li_req":"y","li_variants":"True\nFalse\nNot given","li_radcb":"rb","li_nm":"8. The author lists the hurdles to creating an endless engine."},{"lid":"1729867291966","ls":"180","loff":"","li_type":"rd","li_title":"9. Nevertheless, the quest for this device has driven numerous technological breakthroughs.","li_req":"y","li_variants":"True\nFalse\nNot given","li_radcb":"rb","li_nm":"9. Nevertheless, the quest for this device has driven numerous technological breakthroughs."},{"lid":"1729867307731","ls":"190","loff":"","li_type":"rd","li_title":"10. The dream of an endless engine is close to becoming a reality.","li_req":"y","li_variants":"True\nFalse\nNot given","li_radcb":"rb","li_nm":"10. The dream of an endless engine is close to becoming a reality."},{"lid":"1729867858310","ls":"200","loff":"","li_type":"ws","li_rows":"1"},{"lid":"1729867328872","ls":"210","loff":"","li_type":"tx","li_text":"
Vocabulary & Grammar<\/strong><\/div>"},{"lid":"1729867333348","ls":"220","loff":"","li_type":"rd","li_title":"11. Nicholas never plays tennis ____weekdays.","li_req":"y","li_variants":"at\non\nin\nthe","li_radcb":"rb","li_nm":"11. Nicholas never plays tennis ____weekdays."},{"lid":"1729867372193","ls":"230","loff":"","li_type":"rd","li_title":"12. - I have a terrible toothache. \u2013 You ______ go to a dentist.","li_req":"y","li_variants":"must\nhave to\ncan\nshould","li_radcb":"rb","li_nm":"12. - I have a terrible toothache. \u2013 You ______ go to a dentist."},{"lid":"1729867391438","ls":"240","loff":"","li_type":"rd","li_title":"13. I\u2019ve never been _____ Europe.","li_req":"y","li_variants":"in\naround\non\nto","li_radcb":"rb","li_nm":"13. I\u2019ve never been _____ Europe."},{"lid":"1729867410686","ls":"250","loff":"","li_type":"rd","li_title":"14. Cats _____often chased by dogs.","li_req":"y","li_variants":"were\nare\nare being\nhave","li_radcb":"rb","li_nm":"14. Cats _____often chased by dogs."},{"lid":"1729867430109","ls":"260","loff":"","li_type":"rd","li_title":"15. Look at those guys! They _____be friends.","li_req":"y","li_variants":"can\nmight\nhave\nprobably","li_radcb":"rb","li_nm":"15. Look at those guys! They _____be friends."},{"lid":"1730556792941","ls":"270","loff":"","li_type":"rd","li_title":"16. \u201cIf I had a million dollars, I would fly to the Moon.\u201d Which conditional is this?","li_req":"y","li_variants":"Zero\nFirst\nSecond\nThird","li_radcb":"rb","li_nm":"16. \u201cIf I had a million dollars, I would fly to the Moon.\u201d Which conditional is this?"},{"lid":"1730556836125","ls":"280","loff":"","li_type":"rd","li_title":"17. Jane told me that she ________ to the mall yet.","li_req":"y","li_variants":"won\u2018t go\nhasn\u2018t gone\ndidn\u2018t go\nhadn\u2018t gone","li_radcb":"rb","li_nm":"17. Jane told me that she ________ to the mall yet."},{"lid":"1730556871264","ls":"290","loff":"","li_type":"rd","li_title":"18. My neighbours asked me to look _____ their puppy. ","li_req":"y","li_variants":"for\nafter\nout\nup","li_radcb":"rb","li_nm":"18. My neighbours asked me to look _____ their puppy. "},{"lid":"1730556906409","ls":"300","loff":"","li_type":"rd","li_title":"19. My close friend Nick never plays cricket. _______!","li_req":"y","li_variants":"Me too\nSo do I\nNeither do I\nIm with Nick","li_radcb":"rb","li_nm":"19. My close friend Nick never plays cricket. _______!"},{"lid":"1730556934625","ls":"310","loff":"","li_type":"rd","li_title":"20. The moon goes round the Earth,\u00a0_______?","li_req":"y","li_variants":"is it\ndoes it\ndoesn\u2018t it\nisn\u2018t it","li_radcb":"rb","li_nm":"20. The moon goes round the Earth,\u00a0_______?"}]