Complex sentence: He has also appeared on radio, presenting "You & Yours" on BBC Radio 4, he joined "Countryfile" in 1989 and two years later he became a presenter on "Top Gear".
Split into simpler sentences: He has also appeared on radio, presenting "You & Yours" on BBC Radio 4. He joined "Countryfile" in 1989 and two years later he became a presenter on "Top Gear".