应该选D.是宾语从句.
I willtell you (all)he told me last week.括号也可填what或all (that);
该句中all 既作I willtell you 后的宾语,也作he told me 后的宾语.因为tell可以接双宾语.
句子意思为:我将会把他昨天告诉我的一切告诉你.