题目

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.  A. were hanging    B. had hung       C. hung       D. would hang  答案：C.   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.

查看本题答案和解析