Замените придаточные предложения формами Participle II. Though he was not prepared well, he could answer that question.
Though not prepared well, he could answer that question.
1. When the letter was written, it was sent to Moscow. 2. If you are invited
to the party, you should come in time. 3. As he was asked, he brought his
article. 4. Though he was invited he did not come to the party. 5. When
the book was translated into the Russian language, it was read with great
interest.