-I don’t know what if I do that. ---I think you tell him the whole thing first.A. hap

问题补充：

---I don’t know what if I do that.

---I think you tell him the whole thing first.

A. happens; should

B. happens; shouldn’t

C. will happen; should

D. will happen; shouldn’t

答案：

A. happens; should

B. happens; shouldn’t

(答案→)C. will happen; should

D. will happen; shouldn’t

解析：第一句为宾语从句，如果主句为一般现在时，从句根据自己的情况，故选用将来时，根据上下文的意思，可知答案为C