It is Sunday in summer and all the trains are full of people.An old man is looking __a seat throughthe windows.Suddenly he sees __and gets on the train A small bag is lying on the seat and a young man is sitting beside it.还有一些我打得累死

It is Sunday in summer and all the trains are full of people.An old man is looking __a seat throughthe windows.Suddenly he sees __and gets on the train A small bag is lying on the seat and a young man is sitting beside it.还有一些我打得累死
It is Sunday in summer and all the trains are full of people.An old man is looking __a seat through
the windows.Suddenly he sees __and gets on the train A small bag is lying on the seat and a young man is sitting beside it.还有一些我打得累死了,在轻负高效里的,知道的就求求你们了

It is Sunday in summer and all the trains are full of people.An old man is looking __a seat throughthe windows.Suddenly he sees __and gets on the train A small bag is lying on the seat and a young man is sitting beside it.还有一些我打得累死
for ：look for寻找
one：指代a seat
其他的没打出来,我也就没办法了

It is Sunday in summer and all the trains are full of people.An old man is looking for a seat hrough
the windows.Suddenly he sees one and gets on the train .A small bag is lying on the seat and a young man is sitting beside it.
look for寻找
one：指代a seat