7．There is no plant lifewithout （沒有） light．

分析 沒有光就沒有植物的生命．

解答 答案：without 此句為there be句型，后面的"沒有"應為介詞，without沒有，故填without．

點評 此題考查介詞辨析，在分析句子結構的基礎上確定答案．

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