Vocabulary

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1. Synonym for essential
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   necessary, vital, key

2. Synonym for obvious
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   clear, evident, plain

3. Synonym for meticulous
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   very careful, thorough, precise

4. Synonym for prevalent
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   widespread, common, dominant

5. Opposite of permanent
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   temporary

6. Opposite of abundant
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   scarce

7. Opposite of feasible
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   impossible, unworkable

8. Complete: Regular exercise has a positive ___ on health.
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   impact / effect

9. Complete: He gave a ___ explanation for the gap in his studies.
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   plausible

10. Complete: The report was ___ ; it covered every department.
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    comprehensive

11. Complete: Do not ___ the problem by ignoring it.
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    exacerbate

12. Noun form: decide, achieve, analyse, differ
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    decision, achievement, analysis, difference

13. Adjective form: success, depend, compete, education
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    successful, dependent, competitive, educational

14. Add a prefix to make the opposite: legal, patient, satisfied, appear
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    illegal, impatient, dissatisfied, disappear

15. Which word fits a formal essay: a lot of or a considerable number of?
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    A considerable number of. Keep a lot of for speaking.

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