3.Each summer Metcalf stays in Africa to . A. do research on water B. take care of sick people C. spread the technique of using solar cookers D. find out why some animals are endangered 4.Water Pasteurization Indicator was developed to . ...
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Robert Metcalf first used a solar c ooker, the future changed for millions of cans. He knew that billions of poor people aro und the world depend on the use of wood for cooking. As they take more and more firewood from wild areas. they are destroying habitats arond the world wood ...
inworking-agepeople,oftenwithchildren,before theageof60.Theratesofdeathamongparticipantsinthisgroupdidclearlyshowracialdifferences,withapproximately9% ofblacksdyingat anearlyagecomparedto6% ofwhites.There werealsodifferencesincausesofdeathbyrace. Forinstance,black men weresignificantly more likelytodieofmurderan...
I sat down near a lake. There were many children playing with their parents nearby. I felt a little l1. “Shall we play together?” A little girl came toward me with a ball in her hands. I agreed and she h2me the ball with a sweet smile. ...
The first farm they visited was fantastic, which smelled fresh, like plants and rain. The cows were munching( 嚼 )on leaves,clean and smiling. They produced lots of tasty milk. However, the second farm was3. The cows were smelly...
Long ago, however, cameras had not been invented yet. How did people back then record important moments? Some people told stories about old times. Others wrote down what they remembered. Some people made special drawings to help them recall important moments. Among those people were Native Amer...
“Just in time for the school talent show next ___,” I said. “Are you doing anything for the talent show, Jeremy?” Peter asked. “No,” I said. “If I were a little ___, like you, 14 years old, maybe I could, too. I believe you’ll win the first prize this year...
It soon dawned on me that we were trapped. An icy fear crept up my spine. Mrs Lim was hysterical (歇斯底里). “We will never get out!” she cried with her face pale. It had become a colourless mask. ...
14. We're talking about the piano and the pianist___were in the concert we attended last night. A .which B .whom C .who D .that 15. With the popularity of WeChat,___by Ma Huateng, quite a number of people are chatting online.答案在文末 A .created B .creates...