Question

【题目】 I _______ you, but I was too busy then.

A. will help B. helped

C. could have helped D. should have

Answer 1

【答案】C

【解析】

试题分析：考查含情态动词的虚拟语气。句意：我本来可能已经帮助了你，但是那时我太忙。Could have done表示可能已经做了某事，故选C。