题目内容：
根据下列材料请回答题：
According to the passage，a large number of children can be saved only when＿＿＿．
参考答案：
答案解析：
单选题：根据下列材料请回答题：According to the passage，a large number of childr
- 题目分类：公共英语二级
- 题目类型：单选题
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According to the passage，a large number of children can be saved only when＿＿＿．