He was about to tell me the secret 　some

问题选择题

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

A．as

B．until

C．while

D．when

答案

选D。考查连词。句意: 他正要告诉我这个秘密, 这时突然有人拍了一下他的肩膀。be about to do. . . when. . . 是固定句型, “正要做……这时……”。