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D. "his sister, who had taken a sales job, learned shorthand and French in the evenings so that she might be able to get a better position later on"
Euphemism
Explanation: an innocuous word or expression used in place of one that may be found offensive or suggest something unpleasant.
Answer:
by looking up unknown words in a dictionary.
Explanation:
A reader can best verify a prediction by looking up unknown words in a dictionary.