单项选择题
People probably take part in dangerous sports nowadays because （）
A．they have a lot of free time B．they can go to hospital if they are injured C．their lives lack excitement D．they no longer need to hunt for food
单项选择题 More and more people today（）
单项选择题 In order to present a balanced picture, （）
单项选择题 Which of the following statements is NOT true（）
