用所给介词填空（答案要告诉我为什么这样做）
用所给介词填空（答案要告诉我为什么这样做）
by in at on with to under for
They like swimming_______the sea.
I wrote a letter________my friend in Australia.
Tom's birthdayis_______Jamuary.
The National Day is_______Friday.
He read the book_______himself.
Last Sunday morning,I played basketball_______my friend Tim.
It is rainy today.My sister is unhappy.I sing a song_____her.
Do you often go to school_______bus or_______foot?
They are singing and dancing______the trees.
Bill is staying________home because he is hill.
They like swimming in the sea.
I wrote a letter to my friend in Australia.
Tom's birthdayis in Jamuary.
The National Day is on Friday.
He read the book by himself.
Last Sunday morning,I played basketball with my friend Tim.
It is rainy today.My sister is unhappy.I sing a song for her.
Do you often go to school by bus or on foot?
They are singing and dancing under the trees.
Bill is staying at home because he is hill.请说明为什么in the sea 在海里write a letter to sb. 写信给某人in January 月份用inon Friday 具体某一天用onby oneself 自己做某事play with sb.和某人玩sing a song for sb. 为某人唱歌by bus乘坐交通工具用byon foot步行under the trees 在树下stay at home 呆在家