Passage Three Questions 33 to 35 are based on the passage you have just heard.

A．It’s a kind of dance music.
B．It is with steady rhythm.
C．It is slow.
D．Some of the rhythms it uses are irregular.

A．Tsunamis are caused by underwater earthquakes.
B．Earthquakes of about magnitude 6.75 on the Richter scale will cause tsunamis.
C．Nearly 90 percent of underwater earthquakes cause tsunamis.
D．Not all underwater earthquakes cause tsunamis.