I __________ (tell) you about my plan, but you stopped me before I could speak.正确答案是 was about to tell我觉得也是should have told是不是两个都可以？？要是我错了，为什么是was about to tell

I __________ (tell) you about my plan, but you stopped me before I could speak.正确答案是 was about to tell我觉得也是should have told是不是两个都可以？？要是我错了，为什么是was about to tell
I __________ (tell) you about my plan, but you stopped me before I could speak.
正确答案是 was about to tell
我觉得也是should have told
是不是两个都可以？？
要是我错了，为什么是was about to tell

I __________ (tell) you about my plan, but you stopped me before I could speak.正确答案是 was about to tell我觉得也是should have told是不是两个都可以？？要是我错了，为什么是was about to tell
should have told
我本想告诉你我的计划,但我还没说就被你打断了.
问题补充：
should have done ,是虚拟语气,表示本要怎么做而没做.
这里可能没有这个意思.
用was about to tell 表示过去正要做某事
be about to do sth ,正要做某事或者正打算做某事.
我正要告诉你我的计划就被你阻止了.

have told