Hearing her husband’s step on the stairs, Della’s face wentpale. A B C DA Hearing---On hea

发布时间：2020-08-17 13:31:56

Hearing her husband’s step on the stairs, Della’s face wentpale.
A                   B                    C   DA  Hearing---On hearing 

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(答案→)A  Hearing---On hearing 
解析：On hearing表示：一听到…
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