单项选择题
Many people see pollution as only part of （）
A．the environmental balance B．our daily life C．the consumption of goods by man D．the whole process of industrial production and consumption of goods
单项选择题 What happened when the man let go the rope（）
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 （）
