You can go out you promise to be back before 11 o'clock.A. as far asB. so far asC. whenD

问题补充：

You can go out, you promise to be back before 11 oclock.

A. as far as

B. so far as

C. when

D. so long as

答案：

A. as far as

B. so far as

C. when

(答案→)D. so long as

解析： as far as= so far as远到…；据…；直到…为止, when 当。。。的时候， so long as只要，句意，你可以出去，只要你答应在11点之前回来。根据句意，应该选择D