{#blank#}1{#/blank#}Opera started in Italy. Mozart was a famous opera composer(歌剧作曲家).He wrote The Marriage of Figaro.

{#blank#}2{#/blank#}Antenna(天线)is used for radio, television, radar and so on. It worked very well in the past, and it is still very useful now.

{#blank#}3{#/blank#}Washington D. C. is the capital of the USA. It is much smaller than New York in population(人口)and size. But it is as important as New York.

{#blank#}4{#/blank#}Now we buy things in supermarkets and shopping centres. But before we bought food and clothes in markets. A long time ago, each town had only one or two markets.

{#blank#}5{#/blank#}The Sears Tower is in Chicago. It was one of the tallest build. It is about 442 metres.