a cold morning.I opened the window and found that it was snowing outside．( )A．ByB．InC．ForD．On 题目和参考答案——青夏教育精英家教网——

题目内容

6．____ a cold morning，I opened the window and found that it was snowing outside．（　　）

A．

By

B．

In

C．

For

D．

On

分析在一个寒冷的早晨，我打开窗户发现外面在下雪．

解答答案：D
句意表达的是具体的某一个早晨，要用介词on；by到什么时候为止，in要构成固定搭配in the morning，for后接时间段，表示动作的持续．故选D．

点评介词用法灵活，搭配较多．学习时要注意积累，对常考的搭配结构要注意掌握．

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