我来猜。

直追前人。

             谜底是____。

下图示意某河流的“V”型河谷形态，读图，完成下列各题。

地球上最具有生物多样性的地区是(      )

阅读下列短文，从每小题的三个选项中选出最佳选项。

    Hello, my name's Kitty. I have a big family. My grandparents are old. They are thin.

    David is my father. He is fat. He is a policeman(警察). This is my mother. Her name is May. She's tall and thin. She is a nurse. John is my uncle. He has a pair of glasses. He is a doctor. He can help people. Sue is my aunt. She has big eyes. She likes kids. She is a teacher. I have one cousin. His name is Peter. John and Sue are his parents.