what/which
1._________ subjects did you enjoy most when you were my age?
2._________ is better exercise,swimming or jogging?
3.Miranda was sure it was one of them,but was not sure __________.
4._________ seat can I take?
5._________ colour is your new school bag?
This is a good question for English learners. what没有范围；which有范围，即：某范围内的哪一个。因此：第一题：What;第二题：Which，二选一；第三题：which，of表范围；第四题：Which，很显然是在几个seat中选一个；第五题：What。
