生活在北极地区的海豹，胸部皮下脂肪的厚度可以达到60毫米，这主要是对下列哪种环境的适应（　　）

A．干旱

B．寒冷

C．空气稀薄

D．缺乏营养

基础训练篇（11）

Mrs. Wilson, the wife of a rich man,  (1)                 some of her friends to lunch. She was trying a new way to cook fish and she was very pleased with  (2)          when the fish was ready. As the fish was very hot, she put it near the open window to  (3)       _____ for a few minutes. Five minutes later, when she came back (4)        it, she was surprised to find the neighbor’s cat at the fish. She was in time to stop the cat before it was too  (5).    _   .That afternoon every one enjoyed the fish. They talked and laughed  (6)    _      four o’clock.

After the guests left, Mrs. Wilson felt tired but happy. She was sitting down in a chair near the window (7)    _____   __ she saw the neighbor’s cat dead in her garden. She was sure the fish was bad. What  (8) _     _ _______ happen to her friends? She at once telephoned the family doctor for help. The doctor wanted each guest  (9)  _____      meet him. Once again Mrs. Wilson was alone in her chair still tired  (10)       _    _  not longer happy. Just then the telephone rang. It was her neighbor, “Oh, Mrs. Wilson,” he cried.” My cat is dead. She was killed by someone in a car and put in your garden …”