__ a cold morning ,Ben went to the park为什么,要有充分的理由
问题描述：
__ a cold morning ,Ben went to the park
为什么,要有充分的理由
答
In a cold moring, Ben went ot the park.
答
填In
答
还是用"on"对
答
On
答
On.
本来是用in the morning,不过有了修饰语,即A COLD,因此要用On.
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