Alice,why didn't you come yesterday?I _,but i had an unexpected visitor.A had B would C w...Alice,why didn't you come yesterday?I _,but i had an unexpected visitor.A had B would C was going to D did答案为什么是选c,B怎么不行呀,

Alice,why didn't you come yesterday?I _,but i had an unexpected visitor.A had B would C w...Alice,why didn't you come yesterday?I _,but i had an unexpected visitor.A had B would C was going to D did答案为什么是选c,B怎么不行呀,
Alice,why didn't you come yesterday?I _,but i had an unexpected visitor.A had B would C w...
Alice,why didn't you come yesterday?I _,but i had an unexpected visitor.A had B would C was going to D did答案为什么是选c,B怎么不行呀,

Alice,why didn't you come yesterday?I _,but i had an unexpected visitor.A had B would C w...Alice,why didn't you come yesterday?I _,but i had an unexpected visitor.A had B would C was going to D did答案为什么是选c,B怎么不行呀,
i was going to表示我本来想去,但是没有去
i would我会去,表示意愿会去,但是有没有去就不清楚了

was going to 在这里的意思是“我本来要去的”
would 的意思是“我会去的”
根据句子，肯定就是was going to了~~~