7．_________ the young trees is our duty．

The author’s purpose of writing this article is to tell people _________.

People who like dancing can come at____________.

29． Hip-hop dancing became popular all over the world ________

36． E-mail is very popular today． People seldom write letters now，_________ ?

BHip-hop dancing(街舞) is popular with many young people today． They like it because they can invent their own moves． They use this dance to show their love for life． It also shows that they feel good about life，that they just want to be themselves and enjoy life，and that they are not afraid of problems．Hip-hop dancing has a history of more than 20 years． It first began in the 1980s in the U． S In early times，it was seen in New York and Los Angles． At that time，many young black people often danced to the music in the streets． They used their legs，arms，heads and even shoulders to dance． Many young people still use most of these moves today．Hip-hop dancing became popular all over the world because of the 1983 movie Flash Dance． Some people performed Hip-hop dancing in the movie． People enjoyed their perform-ance． They began to dance like them． Then it became popular． There are two kinds of Hip-hop dancing:new school and old school． More and more young people are learning Hip-hop dancing．People believe that it is a good way to exercise their bodies，and that it is good for their health．( )26． Young people like Hip-hop dancing because ________

American young people would rather ______ advice from strangers.

28． The young black people used their ______to dance at that time．

— Volunteering is becoming ______ popular in China.— Yeah, people are now aware that helping others is helping themselves.

   There are _______ people dancing and singing in the park on May Day. ( )

_____ confuses many young people.