4. Do you know why we should protect our earth and how we can save our earth? We people care about ourselves and do lots of damages to our earth. If we can cut down fewer trees, we can protect our earth from being damaged. When it rains heavily, we don’t need to worry about landslides. Then, the house won’t move from the top of a mountain to the bottom of it. If we can take more public transportations or share a taxi, we can keep air clean. If we can bring our own shopping bags and bring our own chopsticks, we can help reduce trash. If we can eat less meat, we can not only have a healthy body but do less damage to our earth.　　There is no question that Earth is always a giving planet. It gives us fresh air, clean water, lots of resources and a comfortable place. Without it, we can’t live. It’s just like our mother. But we take it for granted. We can’t find any place like it, so we should love and protect it because we only have one earth.
10)　How many kinds of ways do the writer talk about to save the Earth?　
(A)　One.　
(B)　Two.　
(C)　Three.　
(D)　Four.