American schools begin in September after a long summer holiday. There’re two terms in a school year. The first term is from September to January, and the second term is from February to June. Most American children begin to go to school when they’re five years old. Most students are seventeen or eighteen years old when they finish high school.

High school students take only five or six subjects each term. They usually go to the same classes every day, and they have homework for every class. After class, they do a lot of interesting things.

After high school, many students go to college. They usually have to pay a lot of money. So many college students work after class to get money for their study.

小题1:In America, summer holidays begin in ________.

A．September

B．July

C．May

D．February小题2:Most American children go to school at the age of ________

A．five

B．seven

C．seventeen

D．eighteen小题3:High school students ________ after class.

A．do housework

B．go to work

C．play baseball

D．do interesting things小题4:In order to(为了) ________, many American college students work after class.

A．help their parents

B．get money for their study

C．help others

D．learn some useful things

2008年底，我国网民数从1997年的62万增加到298亿，居世界第2位。其中宽带网民数达到2.7亿，手机网民数达到1.2亿。互联网普及率达到226%，超过全球平均水平。

2008年底，我国互联网的国际出口带宽由1997年的25.4Mbps增长到640286.7Mbps，l1年间增长了25207倍。2008年底，我国IPv4地址数已从2001年底的0.2亿个增加到1.8亿个，全球排名由第9位上升到第3位；域名总数达到1682.6万个。其中国家CN域名在2007年平均每天增长2万个，2008年底已达到1357.2万个，网站数由2000年的265万个增长到2008年的287.8万个，年均增长34.7%。2002年，我国的网页数为1.6亿个，2008年网页数达到160.9亿个。

2005年，我国电子商务交易额达到12992亿元人民币，相当于国内生产总值的7.1%。到2008年底，我国网络购物用户人数达到7400万，占网民总数的24.8%。2008年底，我国使用网络媒体的网民比例达到78.5%，使用电子邮件的网民比例达到56.8%，使用网上教育的网民比例达到16.5%拥有博客的网民比例达到54.3%。

2008年底，我国宽带网民数约自网民总人数的（）。

A．88.3%

B．89.7%

C．90.6%

D．92.1%