2. 外语
  3. Children in China go to school when they are six years old. Children in China go to school ______ of six.

Children in China go to school when they are six years old. Children in China go to school ______ of six.

admin2009-06-21  75
问题 Children in China go to school when they are six years old.
Children in China go to school ______ of six.
选项
答案At the age
解析 用at the age代替when they are six years old指在六岁时。介词短语相当于 when引导的时间状语从句。
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