I think you ought to end it it is too late or you’ll kill yourself.A. even ifB. beforeC.

问题补充：

I think you ought to end it it is too late, or you’ll kill yourself.

A. even if

B. before

C. so that

D. once

答案：

A. even if

B. before

C. so that

D. once

解析：before引导时间状语从句,本意是“在……之前”,在此题中译为“以免”。