6-1introduction ⅰ.单词拼写 1．a s________ is a type of animal or plant. 2．a h________ is the place where an animal lives naturally. 3．a r________is an area of land where animals are protected. 4．c________ means protection, especially of natural things. 5．e______means dead (for a species, not a single animal)． 6．s ________means continuing to live. 答案：1.species 2.habitat 3.reserve 4.conservation 5.extinct 6.survival
