一类英语问题There are different train ticket for people to choose

句子有点错误：
There are（there be结构） different train tickets(主语） for people to choose from（定语）when travelling by train（当乘火车旅行时）
当乘火车旅行时,有不同的火车票供人们从中选择.
for sb to do充当定语.
choose from
挑选,从…中选择
But with so much to choose from,how do you buy the perfect gift for someone?
但选择的范围如此大,你怎么能挑选出最完美的礼物呢?
We have several PC models for you to choosefrom.
我们有好几种计算机型供你从中挑选.

正常搭配应该是choose from different train ticket ，这句因为there be 句型和不定式所以造成了较怪的语序。 choose from 是固定搭配，从……中选出
比如Currently we have 20 different styles to choose from 也是一样的

另外traveld 应该改为主动

、、、、

平时不保留是一种习惯性表达，即是一种省略，在此是正规表述，from是动词choose的介词，向方表（从哪里选择），随时可以这样用，只是不地道，有点繁琐而已，不是由于构成关系才不省的。eg：which one would you choose?The white one or the black one .