问题
选择题
He was about to tell me the secret ______ someone patted him on the shoulder.
A．as
B．until
C．when
D．while
答案
答案：C
题目分析: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。
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