数据3，4，5，6，7的方差是（ ） A．5 B．2.5 C．2 D．2

阅读短文内容，用方框内所给词的适当形式填空，方框内有一个多余的词。(5分)

because     through    rain     two       north     south

   What do you know about London? It is a beautiful city. London is very large. The Thames River（泰晤士河） runs 小题1:_________ the city from west to east. So the city has 小题2:________ parts: the north and the south. In the north, there are important buildings, shops, big parks and interesting places. But the London Eye is in the 小题3:_________.
The weather in London is good. In winter it is not very cold and in summer it is not very hot 小题4: ________ the city is near the sea. People say London is a foggy city and it is often 小题5: ________. It is true.