-Sandy I called you at 9:00 last night but nobody answered the phone.-I’m sorry. We a bir

问题补充：

-Sandy,I called you at 9:00 last night,but nobody answered the phone.

-I’m sorry. We a birthday party Jerry.

A. had;with

B. were having;for

C. are having;for

D. had;for

答案：

A. had;with

(答案→)B. were having;for

C. are having;for

D. had;for

解析：考查动词的时态用法。根据问话中提供的时间，可知是在过去这一具体时间做某事，且强调当时某事正在发生，因此用过去进行时。