＿＿＿＿＿, you have given me a lot of help.
A. Tell the truth
B. To tell the truth
C. Telling true
D. Telling truth
网友回答
A. Tell the truth
(答案→)B. To tell the truth
C. Telling true
D. Telling truth
解析：常见的作插入语的不定式短语有：so to speak(可以说是),to be sure(无疑地),to sum up(概括地说),to tell the truth(说实话),to be honest(坦率地说),to be frank(坦率地说)，to be fair(说句公道话)。