4．Which of the following can also be used as a title of the text?
A．Tangshan Earthquake
B．The world at an end
C．How to prevent an earthquake
D．New Tangshan
5．What does the last sentence “Slowly，the city began to breathe again.” mean?
A．People who were trapped came to life.
B．The trees turned green.
C．The animals began to breathe.
D．The city returned to normal gradually.
