TOEFL doesn't test obscure literary words — it tests the vocabulary of real academic English: lectures, textbooks, research. This list matches that register.
14methodA particular way or process of doing something.
15diverseMade up of many different kinds of people or things.
16evidentClear and obvious; easily seen or understood.
17sufficientEnough for a particular purpose; adequate.
18frameworkA basic supporting structure that gives shape to a building or object.
19indicateTo point out or show; to make something known.
20demonstrateTo show someone how to do something by performing it.
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