问题补充:
I want to show you is my gratitude and respect for your continuous and selfless help.
A. That
B. Which
C. Whether
D. What
答案:
A. That
B. Which
C. Whether
(答案→)D. What
解析:句意:我想对你说的是,对于你连续的和无私的帮助,我表示感激和尊敬。通过分析句子结构,可知这个句子中包含一个主语从句,且引导词在从句中作宾语,表示“什么”的意思,故用What,选D。