D
　　The relationship between the home and market economies has gone through two distinct stages. Early industrialization began the process of transferring some production processes (e.g. cloth-making, sewing and caning¹ foods) from the home to the marketplace. Although the home economy could still produce these goods, the processes were laborious(费力的) and the market economy was usually more efficient.
　　Soon, the more important second stage was evident; the marketplace began producing goods and services that had never been produced by the home economy, and the home economy was unable to produce them (e.g. electricity and electrical appliances, the automobile², advanced education, sophisticated medical care). In the second stage, the question of whether the home economy was less efficient in producing these new goods and services was irrelevant³; if the family were to enjoy these fruits of industrialization, they would have to be obtained in the marketplace. The traditional ways of taking care of these needs in the home, such as in nursing the sick, became socially unacceptable ( and, in most serious cases, probably less successful ).
　　Just as the appearance of the automobile made the use of the horse-drawn carriage illegal and then impractical⁴, and the appearance of television changed the radio from a source of entertainment to a source of background music, so most of the fruits of economic growth did not increase the options available to the home economy to either produce the goods or services or purchase them in the market. Growth brought with it increased variety in consumer goods, but not increased flexibility⁵ for the home economy in obtaining these goods and services. Instead, economic growth brought with it increased consumer reliance on the marketplace. In order to consume these new goods and services, the family had to enter the marketplace as wage earners and consumers. The neoclassical (新古典主义的) model that views the family as deciding whether to produce goods and services directly or to purchase them in the marketplace is basically a model of the first stage. It cannot accurately⁶ be applied⁷ to the second (and current) stage.
　　68. The reason why many production processes were taken over by the marketplace was that
　　[A] it was a necessary step in the process of industrialization
　　[B] the available electricity they depended on was only to the market economy
　　[C] it was troublesome to produce such goods at home
　　[D] the marketplace was more efficient with respect to these processes
　　69. It can be seen from the passage that in the second stage ________.
　　[A] some traditional goods and services were not successful when provided by the home economy
　　[B] the market economy provided new goods and services never produced by the home economy
　　[C] producing traditional goods at home became socially unacceptable
　　[D] whether new goods and services were produced by the home economy became irrelevant
　　70. During the second stage, if the family wanted to consume new goods and services, they had to enter the marketplace _________ .
　　[A] as wage earners
　　[B] both as manufacturers and consumers
　　[C] both as workers and purchasers
　　[D] as customers
　　71.Economic growth did not make it more flexible for the home economy to obtain the new goods
　　and services because _________.
　　[A] the family was not efficient in production
　　[B] it was illegal for the home economy to produce them
　　[G] it could not supply them by itself
　　[D] the market for these goods and services was limited
　　E
　　The earthworm is a useful animal out of the ground. It is food for other animals. In the ground, it makes rich soil for fields and gardens. Earthworms dig tunnels that loosen the soil and make it easy for air and water to reach the roots of plants. Their tunnels help the soil well drained.
　　Earthworms drag dead leaves, grass, and flowers into their caves. When this plant material decays, it makes the soil more fertile.
　　No other animals are so useful in building up good topsoil. It is estimated (估计) that in one year fifty thousand earthworms carry about eighteen tons of fine soil to the surface of an acre ( 公亩) of land.

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