(C)

    Look at all the kinds of drinks on the table．There are milk tea, water, fruit juice，milk and fizzy drinks(碳酸饮料)．What should we drink? Coke，a kind of fizzy drink，tastes great，but it is really bad for your teeth and bones．It has a lot of sugar．Some drinks are good for us．Some are not．The doctors tell us to drink water and milk．Our body has lots of jobs and it needs water to do many of them．Milk is good for your eyes and bones．

—No，he didn't．

A：How was your summer holiday this year?

B：I went to the countryside．

A：

B：Yes! There are many green trees and clean rivers．

A：Did you have a good time there?

B：How about you?

A：

B：We are going to Beijing this winter, too．

A：It would be very cold．

B：Good idea．

(B)

  A forest is a large area of trees．Forests are very important because they provide shelter and food for birds and insects．Birds make their nests in trees．Small animals and insects build their homes in the hollows of trees．Leaves，flowers and fruits are their food．In the past，People got wood from forests．Some people cooked food with wood．People cut down trees to make houses，furniture and paper．Now，Many animals in the forests die because they lose their homes and their food．We must stop cutting down forest．