He was about to tell me the secret someone patted him on the shoulder.A. asB. untilC. wh

问题补充：

He was about to tell me the secret someone patted him on the shoulder.

A. as

B. until

C. when

D. while

答案：

A. as

B. until

(答案→)C. when

D. while

解析：

试题分析:句意：他正要告诉我这个秘密，这时有人拍了拍他的肩膀。固定句型：be about to do ….when“正要做某事……这时”，答案选C。