【正确答案】 Even with a bumper harvest, China still faces a daunting challenge of feeding one fifth of the world’s population with only 7% of the earth’s farmland. Among many grave challenges the Chinese government faces is loss of farmland. In the last few years, about 667,000 hectares of farmland has been grabbed/seized /requistioned/expropriated for urban sprawl, industrial expansion and road building, and another 10,000 square kilometers of cultivated land desertified each year on average. As ground water table drops in northern China, farmers there have to grow drought-resistant, low-yield crops and even leave land unattended. On top of that, agricultural infrastructure is in serious disrepair, with two thirds of irrigation facilities in need of overhaul. Agricultural production model is changing as farmers opt for cash crops to increase income. In the last dozen years, China has added 1.3 million hectares to the total growing acreage of fruit and vegetable each year on average. The result is a plummet/sharp drop/drastic fall in output of rice, corn and wheat. China has become a net grain importer instead of a net exporter. The Chinese government makes agricultural reform/upgrading a top priority. It is investing hugely to raise purchasing prices of wheat and price and upgrade/retool/reengineer/revamp irrigation infrastructure. Steady/sustained increases in prices of farm produce in recent years have led to growing interest/enthusiasm of grain growers. /With rising prices of agricultural products in recent years, grain growers have become more interested in farm work.