Re--|||-frigerators are costly and they need electricity. Yet spoiled food not only creates health-|||- 1 but also economic losses.In 1995,a teacher in northern Nigeria named Abba found-|||-a(n) 2 He 3 the Pot-in-Pot Preservation/Cooling System.-|||-It uses two round containers made of clay.A smaller pot is placed inside a larger one.-|||-The space between them is filled with wet sand.The inner pot can be filled with fruit,-|||-vegetables or drinks.A wet cloth covers the whole cooling system. Food stored in the-|||-smaller pot is kept from 4 through a simple evaporation(蒸发)process.Water in the-|||-sand between the two pots evaporates through the surface of the larger pot,where drier-|||-outside air is moving.-|||-The evaporation process creates a drop in temperature of several degrees. This cools-|||-the inner pot and helps keep food safe from harmful 5 Some foods can be kept 6 -|||-this way for several weeks. People throughout Nigeria began using the 7 --|||-came 8 with farmers in other African countries.Abba personally 9 the first five-|||-thousand pot-in-pot systems for his own community and five villages nearby.-|||-1. __ 2. __ 3. __ 4. __ 5. __-|||-6. __ 7. __ 8. __ 9. __Ⅲ.Reading comprehension Section A Directions: Com plete the following passage by using the words in the box.Each word can only be used once.Note that there is one word more than you need.

Ⅲ.Reading comprehension Section A Directions: Com plete the following passage by using the words in the box.Each word can only be used once.Note that there is one word more than you need. A. harmed B.Solution C.Risks D.spoiling E.Bacteria F.invention G.Popular H. Fresh I. financed J.Developed For many of the world's poor,finding a good way to keep food cool is difficult. Re- frigerators are costly and they need electricity. Yet spoiled food not only creates health _1 but also economic losses. In 1995,a teacher in northern Nigeria named Abba found a(n)_ 2.He__3 the Pot-in-Pot Preservation/Cooling System. It uses two round containers made of clay.A smaller pot is placed inside a larger one. The space between them is filled with wet sand.The inner pot can be filled with fruit, vegetables or drinks. A wet cloth covers the whole cooling system.Foodstored in the smaller pot is kept from_ 4 through a simple evaporation(蒸发)process. Water in the sand between the two pots evaporates through the surface of the larger pot,where drier outside air is moving. The evaporation process creates a drop in temperature of several degrees. This cools the inner pot and helps keep food safe from harmful 5_.Some foods can be kept_ 6 this way for several weeks. People throughout Nigeria began using the_ 7.And it be- came_ 8 with farmers in other African countries. Abba personally_ 9 the first five thousand pot-in-pot systems for his own community and five villages nearby. 1.__2._ 3._ 4._5. _6.__7.__ 8._9.__ _