Ielts vocabulary Masterclass book + ielts listening & Reading Dictionary: Dominate Proficiency Level Vocabulary for ielts listening, Reading, Writing & Speaking

Valid = acceptable or reasonable
Determine = find out, discover or decide after doing research

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Establish = prove or consolidate
Significant = meaningful or important
Miscalculation = a mistake, using bad judgment or making an error in a
calculation.
Methodical = being organised or careful and patient when you do
something.
Cram = to overload the brain by trying to learn a lot in a short period of
time.
Compulsory = obligatory, something you HAVE to do

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Exercise
Choose a word or phrase from the definitions above and write it in the
correct gap below.
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 If there is more than one possible answer, choose the best option
for the sentence.
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 You might need to use the same word or phrase more than once
in some cases.
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 You may need to adapt the form of the word to fit into the