A．young ageB．his attitude on Iraq warC．lack of experien……

单项选择题A．Because they lack parental love.B．Because they are too young.C．Because they commit serious crimes.D．Because they are homeless.

单项选择题A．industrial goodsB．agricultureC．service industriesD．tourism

填空题将how改成however。

填空题将frequent改成frequently。

填空题将Also改成Thus或Therefore。