The forecast is grim. Governments might quell the protests, but bringing down food prices could take at least a decade, food analysts say. One reason: billions of people are buying ever-greater quantities of food, especially in booming China and India, where many have stopped growing their own food and now have the cash to buy a lot more of it. Increasing meat consumption, for example, has helped drive up demand for grain, and with it the price.

　　There are other problems too. The spike in oil prices, which hit $103 per barrel in recent days, has pushed up fertilizer prices, as well as the cost of trucking food from

　　farms to local markets and shipping it abroad. Then there is climate change. Harvests have been seriously disrupted by freak weather, including prolonged droughts in Australia and southern Africa, floods in West Africa, and this past winters deep frost in China and record-breaking warmth in northern Europe.

　　注意：此部分试题请在答题卡2上作答。

　　47. What triggered a violent protest about food prices in Cameroon? .

　　48. According to Joachim von Braun, what worries officials all over the world? .

　　49. By food analysts, what made it so difficult to bring down food prices in a short time? .

　　50. would go up with the increasing meat consumption everywhere on the globe.

　　51. The increase in oil prices has helped to boost the prices of fertilizer and that of .

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