改错：In the afternoon I did some baby-sittings, for it is a fun looking after children.
问题描述：
in the afternoon i did some baby-sittings,for it is a fun looking after children.这个是改错，要怎么改
最佳答案： In the afternoon I did some baby-sittings, for it is fun looking after children.
把 a fun 改成 fun，去掉 a，fun是不可数名词。
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