After finishing college,Lindsay plans to marry Heath McNeal, and use the income from her house to buy a block of land and build a new house. But she'll never move too far from home. "I would like to stay in Greenfield,"she said. "I just love everybody here."

　　At her current rate, she'll probably be the town's biggest real estate tycoon(房地产大亨)by the age of 25.

4.Lindsay earned her $40,000 by _____ .

A. selling pigs B. running a farm

C. buying and selling D.Taking pigs to enter competitions

5.What was Lindsay's original plan for her $40,000 ?

A. To buy more pigs. B.To buy a large house.

C.To pay the cost of her education. D.To hold a special wedding ceremony.

6.What do we know about Lindsay's parents ?

A. They lived a poor life.

B. They helped Lindsay manage her money.

C. They didn't have a house of their own.

D. They wanted their daughter to move out.

7.We can inter from the passage that______ .

A. Lindsay will become a real estate agent

B. Lindsay will buy a new house in another city.

C. Lindsay is good at investing her money.

D. Lindsay graduated from Ohio University with high marks.

　　　　　　　　　　　　　　　　　　　　C

　　Researchers are looking into new ways to generate efficient photovoltaic energy (光伏能源) and for this they have been inspired by the v-shaped posture of the Cabbage White butterfly.

　　Photovoltaic energy is the science behind solar power, where light is turned into electricity. It is a two-set process. Step one is a photoelectric effect, caused by sunlight. The second step is an electrochemical process, which generates an electric current.

To improve the collection of sunlight, a research group has been inspired by the resting posture of the Cabbage White butterfly. The species has a natural range across Europe, Asia, and North Africa. To many farmers, the butterflies are regarded as a pest; to others, they are pretty to