A. is proud of

　　B. is fond of C. is familiar with

　　D. is afraid of 【解析】选B。考查短语辨析。句意：我的爷爷喜欢抽烟，但他只是在空闲时抽。be proud of以……自豪；be fond of喜欢；爱好；be familiar with对……熟悉；be afraid of害怕。 15.

　　_____ with all the worries, the young man who was out of work felt upset all day long.

　　A. To be burdened

　　B. To burden C. Burdening

　　D. Burdened 【解析】选D。句意：肩负着所有的担心，这个失业的年轻人整天感到沮丧。be burdened with肩负着。当主句的主语和从句的主语一致时，可以省略系动词be。 Ⅳ. 阅读理解 (A)

　　Even plants can run a fever, especially when they’re under attack by insects or disease. But unlike humans, plants can have their temperature taken from 3, 000 feet away straight up. A decade ago, adopting the infrared (红外线)scanning technology developed for military purposes and other satellites, physicist Stephen Paley came up with a quick way to take the temperature of crops to determine which ones are under stress. The goal was to let farmers precisely target pesticide (杀虫剂)spraying rather than rain poison on a whole field, which invariably includes plants that don’t have pest (害虫)problems.

　　Even better, Paley’s Remote Scanning Services Company could detect crop problems before they became visible to the eye. Mounted on a plane flown at 3, 000 feet at night, an infrared scanner measured the heat emitted by crops. The data were transformed into a color-coded map showing where plants were running“fevers”. Farmers could then spot-spray, using 50 to 70 percent less pesticide than they otherwise would.

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