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
A.the box of bricks was heavier than him B.the box of bricks was lighter than him C.the box of bricks came down too fast D.the man was too careless
A.the box of bricks B.the ladder C.the top of the buliding D.the pulley