Hua Sheng and Lu Sheng，a retired Tibetan couple，have become trailblazers（開拓者）of grape growing and winemaking in their old ages.
   Lu Sheng learned grape planting and winemaking from her grandmother's sister.Since they retired，the couple have moved to Lhasa from the village of Yakhadi.Though the fact that the region's capital，which is 3，600 meters above sea level，is considered unfit for growing grapes，Lu Sheng and Hua Sheng began an ambitious project in 2015，planting grapes in Tsalna，a town in the suburb of Lhasa.
   They received support from the local government，which is committed to developing business and the economy.The couple's project provides jobs for rural residents，and，as a result，the government has considered the project part of its poverty relief program.
   "Lhasa is an ideal place for planting French grape varieties that are resistant to cold，drought and disease，and adaptable to high-altitude and open-air planting，" Lu Sheng said.
   "Thanks to the plateau's sunshine and organic planting，our grapes grow very well here in Lhasa.The grapes are a bit sour and sweet，and they have a high anthocyanin（花青素） content，" she said.Anthocyanins，which are in grape cells and contribute rich color to wine，are water-soluble（水溶性的）.
   In 2018，Hua Sheng and Lu Sheng expanded their project，planting on nearly 6.67 hectares.In order to familiarize Tibetan farmers with grape planting and winemaking，they taught the skills to local villagers.
   "We have successfully taught the local farmers how to grow grapes and make wine over the three years.They now have a new source of income besides traditional farming and herding，" Hua Sheng said.
   Yudron，a resident of Nam，said she was grateful to the grape planting project in her village，which has contributed to her income and quality of life. "After working in the vineyards for years，now we know how to make wine.We drink both barley and grape wine now.We love grape wine more，though，as it is healthier."

（1）What did the couple do after their retirement？

A

A

A．They grew grapes and made wine in Lhasa.
B．They made friends with a French expert.
C．They moved to another city from Lhasa.
D．They learned grape planting from Hua Sheng's grandmother.
（2）Why was the couple's project thought of as a poverty relief program？

C

C

A．They donated grapes to local schools.
B．They provided free wine for villagers.
C．They employed local residents as workers.
D．They expanded the project with the local government.
（3）Which is the function of anthocyanins？

D

D

A．They make grapes more delicious.
B．They can accelerate the growth of grapes.
C．They make grapes a bit sour and sweet.
D．They provide rich colors for wine.
（4）For the project conducted by the couple，Yudron is

A

A

.
A．a(chǎn)ppreciative
B．cautious
C．indifferent
D．hesitate