单项选择题
A．the less pollution we have B．the harder pollution can be done away with C．the more pollution there will be D．the more easily pollution can be controlled
What happened when the man let go the rope（）A．The box f...
单项选择题What happened when the man let go the rope（）
A．The box fell down and hit the man on the head. B．The box continued to go up. C．The man went up to the top of the building. D．The man fell down and broke his legs.
（） should involve in the campaign to deal with the subs...
单项选择题（） should involve in the campaign to deal with the substance abuse among youth.
A．Schools B．Local, state and national government C．Family and community D．All of the above
30（）A．inB．onC．ofD．from
单项选择题30（）
A．in B．on C．of D．from
