Britons are allowing to let their manners slip, researchers claim. More than 8 out of 10 passengers refuse to give up their seats on the bus, train or tube, a survey by health care provider Simplyhealth said. Around half of workers do not make cups of tea for colleagues while 86 percent of the nation do not offer to carry bags for others, it was claimed. According to the survey of more than 1,000 adults, the main causes of people not bothering were lack of time and much stress at work. Jamie Wilson of Simplyhealth said: "Committing just half an hour a month to helping someone else can make a real difference to your life as well as theirs. As a health care provider, we encourage our staff to get active in the community supporting others—in fact we give 100 days a year to staff to spend a day helping at a charity of their choice." Mental health expert Dr. Christian Jessen said: "We all know that helping others is of benefit to them, but many people don't realise that getting active to help others can also improve your mental and physical well-being. Simple activities like walking the neighbor's dog or helping in the garden help to lose some weight and improve general fitness, leading to a healthier, happier nation."1.What's the main cause for modern Britons' declining manners?A) Improved national well-being.B) Indifference between neighbours.C) Limited time and more stress.D) Change of the lifestyle.2.According to the passage, how much time does Simplyhealth allow its staff to spend helping others?A) Half an hour a day.B) Half an hour a month.C) One day a year.D) 100 days a year.3.What is the main idea of the passage?A) The modern Britons' well-being declines.B) The nation calls for more volunteers.C) Experts urge people to be nice.D) Helping others makes people healthier.