TEXT G
First read the following question.
53. What is the main idea of the passage?
A. Bees communicate with each other by dancing.
B. Animals have internal steering devices.
C. The Sun is necessary for animal navigation.
D. The Earth’s magnetic fields guide pigeons home. 
正确答案是

Now go through TEXT G quickly and answer question 53.
　
Researchers have found that migrating animals use a variety of inner compasses to help them navigate. Some steer by the position of the Sun. Others navigate by the stars. Some use the Sun as their guide during the day, and then switch to star navigation by night. One study shows that the homing pigeon uses the Earth’s magnetic fields as a guide in finding its way home, and there are indications that various other animals, from insects to mollusks, can also make use of magnetic compasses. It is of course very useful for a migrating bird to be able to switch to magnetic compass when clouds cover the Sun; otherwise it would just have to land and wait for the Sun to come out again.
　
Even with the Sun or stars to steer by, the problems of navigation are more complicated than they might seem at first. For example, a worker honeybee that has found a rich source of nectar and pollen flies rapidly home to the hive to report. A naturist has discovered that the bee scout delivers her report through a complicated dance in the hive, in which she tells the other workers not only how far away the food is, but also what direction to fly in relation to the Sun. But the Sun does not stay in one place all day. As the workers start out to gather the food, the Sun may already have changed its position in the sky somewhat. In later trips during the day, the Sun will seems to move farther and farther toward the west. Yet the worker bees seem to have no trouble at all in finding the food source. Their inner clocks tell them just where the Sun will be, and they change their course correspondingly.
　
TEXT H
First read the following question.
54. The passage supports which of the following conclusion?
A. By the 1930’s jazz was appreciated by a wide audience.
B. Classical music had a great impact on jazz.
C. Jazz originated in New Orleans in the early nineteenth century.
D. Jazz band were better known in Europe than in the United States. 
正确答案是

Now go through TEXT G quickly and answer question 54.
　
The fist jazz musicians played in New Orleans during the early 1900’s. After 1917, many of the New Orleans musicians moved to the south side of Chicago, where they continued to play their style of jazz. Soon Chicago was the new center for jazz.
　
Several outstanding musicians emerged as leading jazz artists in Chicago. Daniel Louis "Satchmo" Armstrong, born in New Orleans in 1900, was one. Another leading musician was Joseph "King" Oliver, who is also credited with having discovered Armstrong, who was in New Orleans, to join his band.

In 1923 King Oliver’s Creole Jazz Band under Louis Armstrong also made the first important set of recording by a Hot Five and Hot Seven bands recordings of special note.
　
Although Chicago’s South Side was the main jazz center, some musicians, in New York were also demanding attention in jazz circles. In 1923 Fletcher Henderson already had a ten-piece band that played jazz. During the early 1930’s, the number of players grew to sixteen. Henderson’s band was considered a leader in what some people have called the Big Band Era. 
　
By the 1930’s, big bands were the rage. Large numbers of people went to ballroom to dance to jazz music played by big bands.
　
One of the most popular and a very famous jazz band was the Duke Ellington band. Edward "Duke" Ellington was born in Washington, D.C. in 1899, and died in New York City in 1974. He studied the piano as a young boy and later began writing original musical compositions.
　
The first of Ellington’s European tours came in 1933. He soon received international fame for his talent as a band leader, composer, and arranger. Ten years later, Ellington began giving annual concerts at Carnegie Hall in New York City. People began to listen to jazz in the same way that they had always listened to classical music.