Xiao Qiang,a l 2-year-old Chinese boy,has too many activities．His father 1 him away from school four afternoons a week and drives him across town to practice．"I do most of my 2 in the car when we are 3 to practice,and I have to do the rest (剩下的) when I get home．I am too tried, I just want to sleep." He said. "More and more kids (小孩) become unhappy 4 they have too many activities to do." said Mr. Wang,an expert (专家)of child development．"4l％of the children aged 9-13 said they felt 5 most of the time,and more than 75％0f them said that they wished they had more 6 to play." "Over-scheduling (过量的课程安排) is a growing problem(问题) for Chinese families." said Mr. Wang．It is not good for both kids and their parents. More families eat dinner 7 or often eat fast food 8 their way to football practice or music lessons. We all know it is important for kids to learn how to relax(放松). If they don't learn that now, it will be more difficult to learn when they get 9 . Kids need time to relax. Parents should 10 about what is right for kids.
( )1. A. take ( )2. A. sports ( )3. A. riding ( )4. A. but ( )5. A. excited ( )6. A. great time ( )7. A. slowly ( )8. A. on ( )9. A. taller ( )10. A. hear
B. takes B. business B. flying B. or B. interested B. full time B. quickly B. by B. stronger B. think
C. took C. homework C. walking C. because C. worried C. right time C. quietly C. in C. older C. look
D. to take D. housework D. driving D. so D. dangerous(危险的) D. free time D. happily D. across D. better D. tell
-1，其中p为价格，Q为需求量，且当p=1时需求量Q=1．试求需求函数．