How I wish that you could attend the party even though you busy.A. had beenB. would beC.

问题补充：

How I wish that you could attend the party, even though you busy.

A. had been

B. would be

C. were

D. are

答案：

A. had been

B. would be

C. were

(答案→)D. are

解析：wish后接宾语从句, 从句要用虚拟语气。由句中的could attend可知，这是与现在事实相反的虚拟语气，所以“繁忙”应是现在的情况。故答案为D。