–Tom, you didn’t e to my party last night?
– I , but my mom hurt her back and I had to look after her.
A. had to
B. didn’t
C. wouldn’t
D. was going to
网友回答
A. had to
B. didn’t
C. wouldn’t
(答案→)D. was going to
解析：
由下面的but可知是妈妈背受伤了要照顾，本来是打算去了，可知Ｄ正确。be going to do 表示计划或打算做某事，此时用过去时was。