--I don't think you can manage it. ----That !A. will all depend onB. will all dependC. all

问题补充：

--I don think you can manage it. ----That !

A. will all depend on

B. will all depend

C. all depends

D. all depends on

答案：

A. will all depend on

B. will all depend

(答案→)C. all depends

D. all depends on

解析：意为：那得看情况而定，用一般现在时，depend为不及物动词，不用加介词。