D. Teenagers can only go to their friends for help.

　8 . The main idea of this passage is that ___________.

A. Teenagers need friends

B. Friends can give good advice

　　C. Parents often choose their children's friends for them

　　D. Good friends can communicate with each other

　　Finland is perhaps the most beautiful and mysterious(神秘) of the countries of northern Europe. Two-thirds of its surface is covered with thick forests and among them lie lakes, connected with rivers and canals. The northern part of this country is inside the Arctic Circle, where almost no trees can grow because of its cold weather and the people use their deer for transport, clothing and food.

Then Finish history began in the Middle Ages. In about1155,Finland was conquered by its western neighbouring Sweden. After a period of rule by Denmark in the 14th century, the Swedes won back independence and power in 1523 under their brave king. During the Napoleonic Wars(1814-1818) Finland was passed finally from Sweden to Russia. The opportunity came in 1917, when the Russian Revolution brought foreign rule of Finland to an end. Shortly after Soviet Russia made peace with Germany, 1919 saw the founding of the Finnish Republic.

The years between the First and Second World War were years of progress and growing development. Finland has no coal or oil, and the nation's wealth lies in the timber(木材) from its forests, which supplies material for paper and furniture making, and it the electric power from its water.

9. From the passage, we learn that Finland .

A. lies inside the Arctic Circle

B. is next to the countries of northern Europe

C. lies east of Sweden

D. is entirely covered with forests and lakes