书上是i need a box to hold my chessmen.为甚么不是i need a box to hold my chessmen in.
问题描述：
书上是i need a box to hold my chessmen.为甚么不是i need a box to hold my chessmen in.
还有i have no money to buy book.为甚么不是i have no money to buy book with.
答
如果你仔细品味一下这句话和“i hold my chessmen in a box”的语境,应该容易区别的.