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 句意为:人们正在研制开发利用太阳能的技术。convert意为“使转变、转换……”;store意为“贮藏、贮备、存储”;receive意为“收到、接到”。故C项合适。
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