题目内容
When I talked with my grandma on the phone, she sounded weak, but by the time we ___ up, her voice had been full of life. ks5u
A. were hanging ks5u
B. had hung ks5u
C. hung ks5u
D. would hang ks5u
C. ks5u
解析: 考查时态。By the time 后的从句中多用一般现在时和一般过去时。根据该题的语境可以断定答案为:C. ks5u
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