找出个句子中的一处错误并改正1,The student I want to see is the one whom st

找出个句子中的一处错误并改正
1,The student I want to see is the one whom studies hardest.
2,The students who was often praised by the teacherwent to college last fall.
3,This book is about the time that Lincoln was president.
4,It is an island which name I have forgetten.