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16 июля, 18:06

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The American physicist. Mr. Hall (make) an important discovery when he was still a student. The effect which (name) after him (include) soon in all textbooks on physics. Once, many years later. Mr. Hall (invite) to a congress of physicists. Many participants of the congress to whom Mr. Hall (introduce) asked one and the same question. "Arent you any relation to the old Hall?" He usually (say).