Tigersarestrongandda的精选

问题详情：阅读下面的材料，根据材料的内容，选择正确*填空。Tigersarestronganddangerousanimals.Butnowtheyareindanger.Inthepast,therewereeightkindsoftigersintheworld.Butduringthe20thcentury,onlyfivewereleft.The...