爬行动物与两栖动物的区别之一是生殖完全摆脱了对水环境的依赖，因为卵壳具有防止水分散失的作用．（     ）

改成陈述句。

舞蹈演员的手指不是常做兰花状吗？

____

    On Sunday, Lucy and I go to a bookshop, then we want to go to the supermarket. But we don't know the way how to get to the bookshop. We ask the policeman in the street for help. He tells us to walk along Renmin Road, and turn right at the second crossing（十字路）. Then we walk and walk but we don't see the bookshop. We are too tired so we take a taxi. “Please take us to the bookshop.” We tell the taxi driver. The taxi driver laughs and says, “ The bookshop is over there, you may get off now.”

根据课文内容填空。

它们大声鸣叫着，翅膀____，我们好不容易____。

从海鸥的这些举动中，我们可以体会到：____。