Артикль не нужен, так как "your" (твой) уже является указателем.
Перевод: <em>Сколько лет <u>твоему</u> питомцу?</em>
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Maybe he returned to Stavropol, but I had never seen him. 2. He was very pale. He's probably very tired. 3. This article must have been written at the beginning of the last century. 4. He told me that I can come here at any time. 5. He may come tomorrow, so as to be received our letter
а глаголы подставь сам