选用所给词的适当形式填空，每个词只能用一次。 change         disappear        provide        perfect describe       protection       importance 1. If we _____ the wetlands to make space for farms and buildings, the birds won't have enough space to live in. 2. Zhalong is one of the world's most _____wetlands because it _____food and shelter for plants, fish and birds. 3. If we want to learn English better, remember 'Practice makes _____.' 4. Many rare animals in China are under state _____. 5. If people don't protect environment for wildlife, more animals _____. 6. Look at some pictures of different kinds of birds carefully, then _____ them.