I think you can if you ___harder A work Bwill work C worked D have workedif 不是 一般将来时.一般现在时结构吗解释下选择理由

问题描述:

I think you can if you ___harder A work Bwill work C worked D have worked
if 不是 一般将来时.一般现在时结构吗
解释下选择理由