Techniques to employ the energy of the sun are being developed.

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问题 Techniques to employ the energy of the sun are being developed.

选项 A、convert
B、store
C、use
D、receive

答案C

解析 根据句意“人们正在研制开发……太阳能的技术。”判断C合适。convert,vt.“使转变,转换……”:store,vt.“贮藏,贮备,存储”n.“商店,店铺,贮藏”。
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