D. He was a famous musician in the world.

57. Isaac Stern played very well and was recognized by music critics first in______.

A. 1936 B. 1979 C. 1937 D. 1984.

58. According to Isaac Stern, we know that ______.

A. music is exactly the same as bread.

B. music can help us get more honors

C. music is the most important in our life

D. music can make children live happily

B

At first, the earth’s surface layer（层）was made up of huge blocks of hard, solid rocks. Then slowly, there rocks broke up into smaller and smaller pieces. Finally stones, pebble（卵石）and grains of sand were formed. Many sorts of plants and animals lived and died on the surface of the earth. Their remains mixed up with the stones, pebbles and formed soil. The outmost layer of the earth is soil.

There are many ways in which large pieces of rock break into smaller ones. Wind, water, heat and cold help to break up rocks. When winds blow grains of sand against a large rock for a long time, the softer layers of the rock are slowly worn away. These leave holes and crack（裂缝）in the rock, which become bigger and finally the rock breaks up into smaller pieces.

The moving water of streams and rivers also help to break up rocks. As the water moves along, it carries with it small pieces of rock. These rub the larger ones. Thus, the larger rocks are worn down to smaller pieces.

The heat of the sun is also helpful to breaking up rocks. When the sun shines, the rocks become very hot. If these rocks are suddenly cooled, they may crack. Ice also plays a part in making soil. Water in the cracks can turn into ice in cold weather. As this happens, it becomes bigger and the cracks become wider, and finally break into smaller pieces.

59. How many factors are mentioned in helping the forming of soil?

A. More than five. B. Five.

C. Four. D. Three.

60. Which of the following speeds up the breaks of rocks most?

A. Hot weather. B. Cold water.

C. More dead plants in the cracks. D. Sharp changes in temperature.

61. Which of the following is NOT true?

A. If a large rock never moves, it will never break up.

B. The remains of many plants of animals formed soil.

C. Even if a large rock never moves, it will break up.

D. Ice in the cracks helps to break up rocks

62. The best title for this passage should be .

A. Soil on the Earth B. Ways to Break up Rocks

C. Soil from Rocks D. Soil, Outmost Layer of the Earth

C