1)It is ____ to ride a bike without wearing a helmet for protection2)The Potala Palace is a ______ Chinese cultural heritage site that has attracted tourists from around the world
3)Tian'anmen Square is very _______, covering an area of 440,000 square meters.
4)Art and nature have formed one of the most _____ scenes in Europe
5)The young man was very _____ _when he did his first experiment with his tutor