10．
Could you identify a maple tree，recognize different insects，or correctly distinguish a tortoise from a soft-shell turtle （鳖）？If the answer is yes，then it's likely that you're old enough to have had a childhood where screens and electronic toys weren't the main free-time activities．If the answer is no，then maybe you're young enough to count among a generation now supposed to be suffering from nature-deficit disorder （大自然缺失症）．
Relating to contemporary children and young people，nature-deficit disorder refers to the increasing tendency to spend very little time outdoors in the open countryside．This suggests that today's kids have little access to nature in the way that their parents did，instead spending most of their spare time inside．21st century kids are more likely to watch TV or play on computers．Even if they do participate in a physical activity，it's very likely to be some kind of organized sport under the watchful eye of adults，rather than wandering through the countryside unsupervised．
Though this might just appear to be a general observation on the way technology has changed childhood，nature-deficit disorder goes beyond a simple lack of exposure to the countryside．This is more like an illness，with symptoms which might include sadness，boredom and loneliness．
The expression"nature-deficit disorder"was coined in 2005 by American author Richard Louv．The term comes from his bestselling book on the same topic entitled Last Child in the Woods-saving Our Children from Nature-Deficit Disorder，which inspired a movement that campaigned to reconnect young people with the natural environment，as exposure to nature is a key factor in healthy child development．
As well as electronic entertainment，causes of nature-deficit disorder include parental fears about traffic and strangers，health and safety rules，and laws against catching wild animals and collecting wild flowers．
66．The author asks some questions at the beginning of the text in order toA．
A．introduce the topic of the text
B．judge if you are old enough
C．examine your natural knowledge
D．examine if you're suffering from some illness
67．Which of the following are the main free-time activities for today's kids？A
A．Watching TV and playing on computers．
B．Wandering through the countryside and distinguishing animals．
C．Participating in physical activities and having organized sport．
D．Catching wild animals and collecting wild flowers．
68．Which of the following is NOT a cause of nature-deficit disorder？D
A．Electronic entertainment． B．Parental fears about traffic and strangers．
C．Health and safety rules． D．Laws against playing in nature．
69．What does the underlined word"uns'upervised"most probably mean？C
A．Without being rewarded． B．Without being hurt．
C．Without being watched． D．Without being disturbed．
70．The American author Richard Louv wrote the book toC．
A．make the term"natural-deficit disorder"popular
B．explain what，causes natural-deficit disorder
C．reconnect young people with the natural environment
D．find out what is the key factor in healthy child development．
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