I saw __ plane coming from the east.这个空填的是a,为什么the不行?

I saw __ plane coming from the east.这个空填的是a,为什么the不行? When I was walking down the street, I saw a plane __ over my 这个英语句子是对的吗 we saw a plane was flying in the sky A typhoon is coming from the（）China Sea.east / East I saw the plane coming towards me.I dashed for cover. 把"i saw the plane coming towards me".和"i dashed for cover".两 I saw the plane coming towards me .I dashed for cover 请高手翻译此句,谢谢：When I saw the plane coming towards me, I dashed I saw the plane coming toward me.I dashed for cover这句话是什么意思啊 （On) I saw the plane coming towards me.I dashed for cover.连接 （On) I saw the plane coming towards me.I dashed for cover.On Yesterday ,I saw a friend of __ from Hong Kong at the statio