根据短文内容，用方框中所给单词的适当形式填空，每词限用一次，每空只写一词。

grass     clear     do      for     be

Everyone knows that eyes are one of the most important parts of our body. Having good eyesight means we can not only see things【小题1】 , but also enjoy some beautiful scenes. There is also a saying going that eyes are the window of our mind. But how can we protect our eyes?
Here【小题2】  some tips for you. First, it is a good habit not to read your books or newspapers【小题3】  a long time because our eyes need rest, too. Second don’t read books in a strong or poor light, otherwise, the light would harm our eyes. At last, remember to keep【小题4】  eye-exercises and watch more green【小题5】and other plants.