问题补充:
–Tom, you didn’t come 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
答案:
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。