When I talked with my grandma on the phone, she sounded weak, but by the time we
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When I talked with my grandma on the phone, she sounded weak, but by the time we ____ up, he voice had been full of life．
A．were hanging B．had hung C．hung D．would hang
试题答案
C
解析:
考查动词时态。此处是陈述一个事实，且为过去发生的动作，故应用一般过去时。