21. What brought about the decline in the demand for American farm products? ��

　　A) The impact of the Great Depression.

　　B) The shrinking of overseas markets.

　　C) The destruction caused by the First World War.

　　D) The increased exports of European countries.

　　22. The chief concern of the American government in the area of agriculturein the 1920s was . ��

　　A) to increase farm production

　　B) to establish agricultural laws

　　C) to prevent farmers from going bankrupt

　　D) to promote the mechanization of agriculture

　　23. The Agricultural Adjustment Act encouraged American farmers to . ��

　　A) reduce their scale of production

　　B) make full use of their land

　　C) adjust the prices of their farm products

　　D) be self-sufficient in agricultural production

　　24. The Supreme Court rejected the Agricultural Adjustment Act because it believed that the Act . ��

　　A) might cause greater scarcity of farm products

　　B) didn't give the Secretary of Agriculture enough power

　　C) would benefit neither the government nor the farmers

　　D) benefited one group of citizens at the expense of others

　　25. It was claimed that the new laws passed during the Roosevelt Administration were aimedat . ��

　　A) reducing the cost of farming

　　B) conserving soil in the long-term interest of the nation

　　C) lowering the burden of farmers

　　D) helping farmers without shifting the burden onto other taxpayers��