補(bǔ)全短文：
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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.
正確答案：CBFAD
答案解析：
1.整篇文章都是講廣告的歷史和現(xiàn)在。這一段以一首兒歌引出主題。C項(xiàng)能很好地起到引領(lǐng)全文的作用。
2.這段講的是羅馬帝國(guó)時(shí)期的一種廣告形式，前一句提到了壁畫(huà)是一種很流行的廣告形式，那么這句應(yīng)提到壁畫(huà)用來(lái)宣傳什么。
3.這段講到當(dāng)今廣告形式。前一句提到了報(bào)紙上的廣告。那么F項(xiàng)中提到的廣播中的廣告也是一種形式，這是合題意的。
4.從后一句的轉(zhuǎn)折可以推斷出這一句講的是雜志和電視上的廣告。
5.這段講的是日常生活中很常見(jiàn)的廣告形式即交通工具上的廣告。從后一句的“trucks”可看出來(lái)D是正確答案。
