I. Đọc và chọn một từ thích hợp đã cho trong khung để điền vào chỗ trống trong đoạn văn.
                        for               danger            unless          alive             extinct           if

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         for               danger            unless          alive             extinct           if

                Nowadays people are more aware that wildlife all over the world is in (26) …………..…………...…… Many species of animals are threatened, and could easily become (27) ………………………   if we do not make an effort to protect them. There are many reasons for this. In some cases, animals are hunted (28) ………………………… their fur or other valuable parts of their bodies. Some birds, such as parrots, are caught  (29)…………………….. and sold as pets. More land is used for farms, for houses and industry, there are fewer open spaces than there once were. Farmers use powerful chemicals to help them grow better crops, but these chemicals pollute the environment and harm the wildlife. The most successful animals on earth – human beings – will soon be the only ones left  (30)…………………..………we can solve this problem.