Why didn‘t you tell me?I ____ tell you .A ,do B,did C,am D,are

题目

Why didn‘t you tell me?I ____ tell you .A ,do B,did C,am D,are

答案

B 助动词do放在动词前面表强调 我的确告诉过你
又因为前面用的是过去式,时态一致所以选B