You can't make much progress in spoken English unless you practice more. (保持句意基本不变)
问题描述：
You can't make much progress in spoken English unless you practice more. (保持句意基本不变)
You _____________ make much progress in spoken English ________ you practice more. 正确答案是will,if为什么不能用can ,if
答
IF 引导的条件状语从句,主句用一般将来时,从句用一般现在时,故答案是 will ,if