Solar Power The sun is【T1】______. It【T2】______. People【T3】______ to【T4】______. Active solar energy【T5】______ to【T6】_____

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问题     Solar Power
    The sun is【T1】______. It【T2】______. People【T3】______ to【T4】______.
    Active solar energy【T5】______ to【T6】______, which【T7】______, computers and televisions. Passive solar energy【T8】______. Instead,【T9】______. For example,【T10】______. Then【T11】______.
    Although【T12】______, solar power【T13】______because【T14】______. Furthermore,【T15】______.
【T14】

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答案it can be expensive to build a building using passive solar technology

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