English Grammar - Read Mode
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Explanation
An 'accident' implies an event that happens by chance or without apparent cause, often unfortunate. Since nobody knocked him down intentionally, it was an accident.
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An autobiography is a self-written account of the life of oneself. A biography is written by someone else. 'Auto' means self, so autobiography is the life story written by the subject.
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'Concrete proof' is a metaphorical expression meaning solid, undeniable, or clear evidence. It does not refer to the building material concrete in this context.
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A pilgrim is a traveler who is on a journey to a holy place for religious reasons. The journey itself is called a pilgrimage.
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Ecology is the branch of biology that deals with the relations of organisms to one another and to their physical surroundings. Thus, 'ecological' relates to the environment.
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Paediatrics is the branch of medicine dealing with children and their diseases. A paediatrician is a doctor who specializes in treating children.
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The original question likely intended 'formerly'. Among the given choices, none fit perfectly grammatically, but 'formerly' is the logical answer in corrected versions. If forced to choose from typical bad distractors in this specific test set, the intended meaning is past occupation.
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To 'provide' means to make available for use; supply. The press supplies the common man with facts. 'Equip' is also possible but 'provide' is the standard usage in this context.
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To 'accept' defeat means to acknowledge it. In political contexts, a candidate 'accepts' or 'concedes' defeat when the results are clear.
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'Separate' means distinct or individual. If two share a bed, the others having 'separate' ones means they each have their own individual bed.