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.
单项选择题 Why did the man fasten the end of the rope before he climbed up the ladder（）
单项选择题 The box of bricks hit the man because （）
单项选择题 How many times did the box hit the man（）
