Green plants take in carbon dioxide and give off oxygen in a food-making process called photosynthesis.

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问题 Green plants take in carbon dioxide and give off oxygen in a food-making process called photosynthesis.

选项 A、Donate
B、check
C、withhold
D、release

答案D

解析 donate“捐赠,赠与”;check“检查,核对”;withhold“使停止,保留,抑制”;release“释放”划线单词give off的意思是“释放”,与release词义相近,故本题选D。句意:绿色植物在被称为光合作用的食物生产过程中吸收二氧化碳,释放氧气。
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