I will tell you the good news as soon as you back.A. comeB. cameC. are comingD. will come

问题补充：

I will tell you the good news as soon as you back.

A. come

B. came

C. are coming

D. will come

答案：

(答案→)A. come

B. came

C. are coming

D. will come

解析：英文中由as soon as，when，等引导的时间状语从句或if引导的条件状语从句，

主句为将来时，从句通常不用将来，用一般现在时代替将来，故本题选A,come.