一. Task-based reading. 选句填空。 It’s hard to turn down tasty bananas. ___1____. However, British scientists say that the fruit may disappear by 2050. One reason for this is climate change. Scientists collected data from more than 200 countries that produce 86 peercent of the world’s bananas. They found that climate change has improved growing conditions in most of these countries.___2____. Ten of the countries, including India, the world’s biggest producer of bananas, will produce fewer bananas. By 2050, the fruit may die out. ___3____. In fact, the perfect temperature range for growing bananas is between 24°C and 32°C. If temperatures get too high, they will stop growing. Diseases are another danger to bananas. Unlike other crops, the bananas we grow come from cutting rather than seeds. This means that all banana plants have the same genotype. ___4____. One serious disease is called Panama. Caused by the fungus in the soil, it spreads easily. ___5____. If one banana plantation suffers from the dissease, it will take 30 years until it is able to grow bananas again. Scientists have yet to find a cure for this disease. A : Shouldn ’ t bananas grow more easily if it ’ s hotter outside? B: However, if temperatures keep rising, the advantage will disappear. C. They taste good and you don ’ t have to wash them before eating them. D. It had spread across South Asia, Africa, the Middle East,and Australia. E. In the other words, if a disease is able to kill one plant, it could kill them all.