Употребите глагол в активном или пассивном залоге The American physicist. Mr.Hall (make) an important discovery when

The American physicist Mr Hall made an important discovery when he was still a student. The effect which was named after him was included soon in all textbooks on physics. Once, many years later, Mr Hall was invited to a congress of physicists. Many participants of the congress to whom Mr Hall was introduced asked one and the same question: \"Aren\'t you any relation to the old Hall?\" He usually said he was.