1. 阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的侧或使用括号中的词语的正确形式填空。

    The polar bear is a vein big white bear. We call it the polar bear  it lives in the Arctic Circle near the North Pole.

    The polar bear lives in snow and ice. At the North Pole there  (be) only snow, ice and water. There is not ally land. The polar bear has a very  (warmly) coat because the weather is cold in the Arctic Circle.

    You can't find the polar bear easily in the snow because  coat is white.

    A grown-up polar bear is usually about three meters long and weighs 450 kilos. It can stand up on its back legs because it has very wide  (foot). It can use its front legs like arms. The polar bear can swim very  (good). It catches fish and sea animals for food. It goes into the sea when it is afraid. People like to kill the polar bear  its beautiful white coat. The government of Canada and  United States call on that people should stop  (kill) polar bears. They don't want these beautiful animals to  (death) out.