I wonder if sheus but I think if sheus we will be able to complete the task ahead of time.

问题补充：

I wonder if sheus,but I think if sheus we will be able to complete the task ahead of time.

A. helps;helps

B. will help;has helped

C. helps;will help

D. will help;helps

答案：

A. helps;helps

(答案→)B. will help;has helped

C. helps;will help

D. will help;helps

解析：I wonder if中的if表示“是否”，从句中应该用一般将来时；I think if ...中的if引导条件状语从句，意为“如果”，从句中用一般时代替将来时。