19．Last year，some groups of students in their community（社区） made a survey about how do people spend their free time？The following diagrams show some results of it：
Diagram 1：Hours for people of different ages who surf the Internet in a week． |
Diagram 2：Different days people go to the library．（library attendance） |
Diagram 3：Different programs people like． |
69．People agedC spend the most time surfing the Internet every week．
A.7-16
B.17-30
C.31-55
D．over 56
70．The word"attendance"in Diagram 2means"B in the library"．
A．the hours people spend
B．the number of people
C．the number of books
D．the days people spend
71．On weekends，C people go to the library every week．
A．over sixty
B．less than sixty
C．about twenty
D．more than one hundred
72．Which of the following is TRUE according to the diagrams？D
A．The fewest people like watching music．
B．Sports are the most people's favorite programs．
C．People seldom go to the library on weekdays．
D．Half of the people like watching news or cartoons．
73．The three diagrams show us the results of a survey aboutB．
A．what people do every day
B．how people spend their free time
C．people's different lifestyles
D．people's different habits．
