20．A．writing         B．singing         C．playing                  D．reading

A

    Most American families like to have a vacation in summer．Summer is a good season for vacation．It is often hot during the months of July and August．Children do not go to school during these two months．

    Some people like to stay at home during their vacation．They walk in the garden，visit their friends，read books or watch TV．Many families take their lunch to a park or somewhere far from the city．They like to cat where there are many trees or a nice lake．If they live near the ocean，they often go to the beach．There they can fish，swim or enjoy the sun．

    Many Americans like to meet people from other countries like Mexico or Canada．Some people have enough time and money to travel to other countries like French，Japan or Argentina．They usually fly to the countries by plane．The United States is a large county．Many families travel by car or by train to see interesting places in their country．Some favorite cities to visit are New York，Chicago，Miami，San Francisco and Los Angeles．These big cities have many famous buildings，theaters，stories and other places of interest for tourists．  

    Not everyone likes to go to busy cities．Some families travel to the mountains or to beautiful valleys．They usually take a camera and return with many nice pictures of the places they visit．It is always fun to put the pictures in an album（相册）and share them with friends．

    根据短文内容，选择最佳答案。

19．A．teacher         B．musician         C．worker                   D．dancer

18．A．her               B．she               C．hers                       D．herself

17．A．to                B．with             C．from                      D．for

16．A．music           B．the radio        C．stories                  D．player