阅读理解 Researchers recently made a survey about how people know trees in UK.They showed them pictures of 10 of Britain's most popular types of trees.They  asked them to name each.Many British people cannot give the right answe rs. One in 20 people questioned could not name any of the Britain's common trees.Horse chestnut and oak are very common in Britain.Britons can see  them everywhere from parks and gardens to the countryside and forests.But  five per cent of Britons could not name the two trees. While older people are more likely than younger adults to name Britain's  local trees,the knowledge is not being passed down. Over 70% parents say they have never taught their children the names of  trees nor asked them about what they may have learnt at school or elsewhere. 'It is very disappointing to learn that people know very little about British  trees,' said one of the researchers. 1．What does this passage mainly talk about? A．Man y Britons cannot name trees. B．A scientifi c survey. C．Parents should teach their children. D．People know very little about Britain. 2．How many people could not name any of the common trees if 200 people were surveyed? A．140 B．20 C．100 D．10 3．It can be inferred from the passage that________. A．the 10 types of Britain's most popular trees can be seen everywhere B．horse chestnut and oak are two kinds of animals seen everywhere in Britain C．older people in Britain may know more about the local trees than the younger ones D．70% of the people questioned can not name the 10 types of Britain's most popular trees 4．The underlined word 'common' in the second paragraph probably means________. A．seldom seen B．often seen C．formal D．local 5．This passage may be taken from________. A．a newspaper B．a dictionary C．a science report D．a textbook