【正文】
Each stone is about 2021kg. pyramid polar bear snail ostrich panda mouse It is/has/lives/likes/… 100g 130kg A. 100g B. 500g kg a kind of mouse in Africa ostrich the biggest bird can’t fly can sleep for 3 years has more than 10,000 teeth snail Most polar bears are lefthanded. polar bear The world is full of _______ things. unusual strange great wonderful interest