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МатематикаВопрос:
15.The new materials...... for bridge construction were described in the article by our professor. a) having recommended, b) recommended, c) recommending, d) having been recommended.
Ответ:
Краткое пояснение: Выбираем пассивную конструкцию, чтобы показать, что материалы были рекомендованы.
Ответ: d) having been recommended
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