---How long have you been studying in No.2 Middle School?

---Less than half a year.

---So it will be two years and a half _______ you graduate from this school.[ ]

A.when  

B.after        

C.before    

D.while

WhateVerhe promises, you can't  ____ anything.   [ ]

A. rely his doing    

B. rely on him to do

C. depend his doing    

D. advise him to do