问题补充:
I first met John at my sister’s wedding. He with the bridegroom at the time.
A. was talking
B. talked
C. had talked
D. had been talking
答案:
(答案→)A. was talking
B. talked
C. had talked
D. had been talking
解析:“at the time”是指“I first met John at my sisters wedding”的时候,提示“他当时正在……”,故用过去进行时。句意:我是在我妹妹的婚礼上第一次遇到约翰的。他当时正在和新郎交谈。