To my __________,the teacher _________what I had told him.

问题描述:

To my __________,the teacher _________what I had told him.
A.delight;was delighting at B.delighting; was delighted at
C.delighted;was delighted at D.delight; was delighted at
.说明为什么选这个,为什么不选那个.感激不尽!

D
不定式后面加动词原形,所以delight.
the teacher was delighted 是被动
delighted at 词组