____her address or telephone number,we couldn`t get in touch with her when we were on holiday
空填Not knowing
人气：106 ℃ 时间：2020-04-01 14:44:34
解答
Not knowing her address or telephone number,=When we don't know her address or telephone number.是伴随状语.主语we在状语从句后面,用伴随形式形容主语,即用动词ing形式.
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