Choose the underlined word or phrase in each sentence that is not correct

choose the underlined word or phrase in each sentence that is not correct
1.you should going out more to relax after studying
A.more    B.going    C.relax    D.studying
2.this exercise was more easy than l expected
A.more eary   B.exercise    C.than    D.expected
3.you mustn't to tell anyone what l ve just told you . It's a secret
A.secret    B.to tell     C.what    D.mustn't