--Tom,you didn't come to the birthday party last ninght?

问题描述:

--Tom,you didn't come to the birthday party last ninght?
--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
最好说明一下

D.was going to
我本打算去,
只有这个合适,与but能产生呼应