第一部分:完形填空(共20小题;每小题1.5分,满分30分)
阅读下面短文,掌握其大意,然后从1~15各题所给的A、B、C和D项中,选出最佳选项,并在答题卡上将该项涂黑。
(A)
People wear hats for three main reasons: protection, communication, and decoration.
Protection. People first began to wear hats to 1 themselves from the clima...