B．Marketing strategies for social robots.

　　C．Information on household robots.

　　D．An introduction to social robots.

　　答案　D　[主旨大意题。通读全文可知，本文主要介绍的是社交机器人。故答案为D。]

　　Passage 10　(2015·陕西)

　　话题：咖啡树种植

　　词数：307

　　The production of coffee beans is a huge，profitable business，but，unfortunately，full－sun production is taking over the industry and bringing about a lot of damage.The change in how coffee is grown from

　　shade－grown production to full－sun production endangers the very existence of certain animals and birds，and even disturbs the worlds ecological balance.

　　On a local level，the damage of the forest required by full－sun fields affects the areas birds and animals.The shade of the forest trees provides a home for birds and other species (物种)that depend on the trees flowers and fruits.Full－sun coffee growers destroy this forest home.As a result，many species are quickly dying out.

　　On a more global level，the destruction of the rainforest for full－sun coffee fields also threatens (威胁) human life.Medical research often makes use of the forests’ plant and animal life，and the destruction of such species could prevent researchers from finding cures for certain diseases.In addition，new coffee－growing techniques are poisoning the water locally，and eventually the worlds groundwater.

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