(六)(A) 阅读材料,从题后所给的A、B、C三个选项中选出最佳答案。 In winter the weather in England is often very cold. In spring and autumn there are some cold days, but there are also days when the weather is warm. The weather is usually warm in summer. It is sometimes hot in summer, but it is not often very hot. There are often cool days in summer. When the temperature is over 27 °C , English people say it is hot. When the temperature is about 21 °C , they say it is warm. In the north of Europe it is very cold in winter. In the south of Europe the summer is often very hot. In the south of Spain the summer is always hot. Water freezes at 0 °C . When water freezes, it changes from liquid to ice. Water boils( 沸腾 ) at 100 °C . When water boils, it changes into steam( 蒸汽 ).