一、            语言知识及应用（共两节，满分35分）

第一节 完形填空（共10小题；每小题2分，满分20分）

阅读下面短文，掌握其大意，然后从21 ─ 30各题所给的四个选项（A、B、C和D）中，选出最佳选项，并在答题卡上将该项涂黑。

People wear hats for three main reasons: protection, communication, and decoration.

Protection. People first began to wear hats to   21   themselves from the climate. In hot, sunny climates, wide-edged hats provide   22   from the sun. In cold climates, people often wear wool hats. In some regions, people wear a variety of protective hats,   23   the season. They may wear a wool hat in winter, a rain hat in spring or fall, and a wide-edged hat in summer. Hats also