单项选择题
The box of bricks hit the man because （）
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
单项选择题 How many times did the box hit the man（）
单项选择题 For the second time, the man's head was hit by（）
单项选择题 After their first experience young people （）
