1.I really don't know which to choose为什么不用to be chosen?????
2.过去分词作定语与动词不定式的被动形式作定语的区别~!~》!?~
3.her hobby is to make model planes.为什么不是用to make?????????
4.i'd like something to drink 为什么不是tobe drink????
第三个改为:her hobby ismakingmodel planes.为什么不是to make