1.Who may work for other degrees as well?
Why students may work for other degrees as well?
2.May students work for other degrees as well?
3.What students may do in other degrres as well?
4.The students may work for other degrees as well, may not they? ( не уверена что так хорошо, но по логике можно )
5. May students work for other degrees or explore new subjects?