It has been proved______eating vegetables in childhood helps to protect you against serious illness...
2023-02-15 07:35:24 174次 2008年高考试题（上海卷）解析版 单项填空 反馈错误 加入收藏 正确率 : 100%
题目内容：
It has been proved______eating
vegetables in childhood helps to protect you against serious illnesses in later
life.
A. if B. because C. when D. that
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