B．in search of

　　C．in charge of

　　D．in time of

　　[解析]考查介词短语辨析。in need of 需要；in search of寻找；in charge of 负责；in time of及时。句意：据报道许多飞机被派往那里去寻找失踪的乘客。

　　[答案]B

　　Ⅱ.阅读理解

　　A

　　Millions of people around the world cook their food over a smoky fire every day.It is often difficult to find wood for the fire.People who do not have wood must spend large amounts of money on cooking fuel.However, there is a much easier way to cook food using energy from the sun.

　　Solar cookers, or ovens, have been used for centuries.A Swiss scientist made the first solar oven in 1767.Today, people are using solar cookers in many countries around the world.People use solar ovens to cook food and to heat drinking water to kill bacteria and other harmful organisms.

　　There are three kinds of solar ovens.The first is a box cooker.It is designed with a special wall that shines or reflects sunlight into the box.Heat gets trapped under a piece of glass or plastic covering the top of the cooker.A box oven is effective for slow cooking of large amounts of food.

　　The second kind of solar oven is a panel cooker.It includes several flat walls, or panels, that directly reflect the sun's light onto the food.The food is inside a separate container of plastic or glass that traps heat energy.People can build panel cookers with very few supplies quickly.They do not cost much.In Kenya, for example, panel cookers are being manufactured for just two dollars.

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