School is a good place for us to study．Yet sometimes，it's easy focus to have accidents there．Experts suggest that right safety training could avoid 80% of these accidents．Here are parts of safety rules in some countries．In China，fire training at school is common to teach students to deal with emergencies（紧急情况）．During the training，students hurry to the playground with a wet cloth covering their mouth．Fire training is held each term．In Japan，public elementary schools hold earthquake training once a month．They teach students how to escape during an earthquake without pushing．Most US school buildings have fire escapes on each floor．A fire escape has platforms（露台）with ladders（梯子）．In many middle schools in the UK，students can choose to take a bicycle course．There，they learn how to ride to school safely．

31． 　　countries are mentioned in this passage．

A．	Two
B．	Three
C．	Four
D．	Five

32．Students should receive right safety training because 　　．

A．	it is easy
B．	it could avoid most of these accidents
C．	it is interesting
D．	it is accepted by the teachers

33．If there is a fire，Chinese students should go to the playground hurriedly 　　．

A．	with a wet cloth covering their mouth
B．	by using ladders
C．	by bike
D．	by pushing each other

34．Public elementary schools in Japan hold earthquake training 　　．

A．	once a week
B．	once a month
C．	once a year
D．	every day

35．This passage mainly talks about 　　．

A．	how to escape from earthquakes
B．	how to put out the fire
C．	some school safety rules in some countries
D．	a bicycle course