---Alice why didn’t you come yesterday?I but I had an unexpected visitor.A. hadB. wo

问题补充：

---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：

A. had

B. would

(答案→)C. was going to

D. did

解析：考查时态。was going to的意思是“本来打算干……”。句意：---Alice,你昨天为啥没来？---我本来打算来的，但来了一位意外客人。