A、 1900s
B、 in the end of 1980
C、 By 2500 BC
D、 do not mention
A、对
B、错
A、对
B、错
A、singing and dancing
B、crosstalk
C、variety shows
D、acrobatics
A、对
B、错
A、对
B、错
A、Use moblie
B、ask help for others
C、use notebook
D、find a private photogragher
A、theatres
B、casinos
C、restaurants
D、corridors
A、对
B、错
A、对
B、错