---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
答案:C
---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
答案:C