Điền từ vào chỗ trống:

    Environment plays an important part in our life. Many people are aware of this. But few of them pay attention to how to protect it. These days, it is impossible to open a newspaper (51) _______ reading about the damage we are doing to the environment. The earth is (52) _______ threatened now and the future looks bad. What can each of us do?

      We can not (53) _______ up our polluted rivers and seas overnight. (54) _______ can we stop the disappearance of plants and animals. But we can stop adding the problem while scientists search (55) _______ answers, and laws are (56) _______ in nature’s defense.

      It may not be easy to change your lifestyle completely, but some steps are easy to (57) _______: cut down the amount of driving you do, or use as little plastic as (58) _______. It is also easy to save energy, which also reduces (59) _______ bills. We must all make a personal (60) _______ to work for the future of our planet if we want to ensure a better world for our grandchildren.