单项选择题
A．their friends ask them to do so B．it often rains in England C．they are going to sell them D．they are their favorite things
A．Because they may have four seasons in one day. B．Because they often have very good weather. C．Because the weather is warm just like in spring. D．Because the sky is sunny all day.
A．it isn't necessary to know their differences B．there are only a few differences in spoken English C．it will be difficult for others to understand you D．it's hard to remember the differences at the same time