—When can we discuss the problem
—（）when we can, we must prepare for it right now.

单项选择题From this passage we know that（）.

A．every American cannot have guns
B．only soldiers and the police can have guns
C．every American citizen can own guns
D．teachers have no money to buy guns

单项选择题How many students were shot dead in 1997 in the US schools（）

A．10
B．9
C．12
D．22

单项选择题The main idea of Paragraph Four shows us（）.

A．some examples of shootings in US schools
B．the Americans’ feeling
C．some famous schools
D．that some teachers were killed by students

单项选择题The report from the US Department of Education shows that（）.

A．the number of the expulsions is now large
B．the number of the expulsions is wrong
C．there are soldiers hiding among the students
D．guns are out of control in US schools

单项选择题From the first paragraph we can infer that in US schools（）.

A．students enjoy shooting
B．students are eager to be soldiers
C．safety is a problem
D．students can make guns