补全短文：
Advertisement
Many adults in the United States can remember crying the nursery rhyme in the street "Hot cross buns!" ____________ (1)
Written advertisements probably began with hieroglyphics more than three thousand years ago but only a few people could read these symbols.So merchants made signs with pictures of their tools over their doors to identify their businesses.
In the time of the Roman Empire,wall paintings were a popular form of advertisement.____________ (2) People often advertised a house for rent or a freshwater bath in this way,too.
Today,large wall signs are still used for outdoor advertising.But outdoor advertising is only a small fraction of the total advertising.About forty per cent of all ads are printed in daily newspapers.____________ (3) Some people think they are the best form of advertising because radio broadcasts reach almost everyone in a nation.
____________ (4) However,usually only large companies can advertise on a national network,because TV commercials shown across the country can cost many thousands of dollars.
Then there are ads that are almost part of daily living.____________ (5) Ads are painted on the trucks that deliver products people are buying or selling.
A.Advertisements in magazines and on television reach many people,too.
B.An ad for a play,or some other performance was painted on part of a building or on a wall around a city.
C.But only a few people realize this was an early form of advertising.
D.If you use public transportation,you will see large printed ads,called car cards,on buses and taxis and in train.
E.Advertisements can be seen everywhere.
F.Radio commercials also provide this kind of information.
正确答案：CBFAD
答案解析：
1.整篇文章都是讲广告的历史和现在。这一段以一首儿歌引出主题。C项能很好地起到引领全文的作用。
2.这段讲的是罗马帝国时期的一种广告形式，前一句提到了壁画是一种很流行的广告形式，那么这句应提到壁画用来宣传什么。
3.这段讲到当今广告形式。前一句提到了报纸上的广告。那么F项中提到的广播中的广告也是一种形式，这是合题意的。
4.从后一句的转折可以推断出这一句讲的是杂志和电视上的广告。
5.这段讲的是日常生活中很常见的广告形式即交通工具上的广告。从后一句的“trucks”可看出来D是正确答案。
