to be chosen from与to choose from区别

to be chosen from与to choose from区别
1.The real problem for the coach is that there are few top players____.
A to be chosen from B to choose from
2.Today,there is a wider ranger of jobs that people____.
A can be chosen B can choose C chosen from D can choose from
3.–“I’d like to buy an expensive camera.”
-“Well,we have several models _____.”
A to choose from B of choice C to be chosen D for choosing
4.I never thought there would be so many computers ___,so I couldn't decide ____.
A.to choose from,which to buy B.for choosing,what to buy
C.to choose from,to buy which D.to be chosen,which to be bought
要不要,这问题困扰我好久,还是加不加都一样?