问题描述：
填上适当的介词使句子通顺：
1.There is a post office __________ the end of the street.
2.The firemen put _________ the fire in ten minutes.
3.I am reading an interesting article ________ a website now.
4.Her room is _______ a mess.I agree ________ you.
5.John looks so sad Do you know what happened _________ him?
1.There is a post office __________ the end of the street.
2.The firemen put _________ the fire in ten minutes.
3.I am reading an interesting article ________ a website now.
4.Her room is _______ a mess.I agree ________ you.
5.John looks so sad Do you know what happened _________ him?
问题解答：
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