问题
选择题
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
答案：C
C [考查动词时态。根据后句句意可知，到我挂电话的时候， 我祖母的声音已经又恢复了活力。表示“挂断电话”时，是过去某一时候，故用过去时态。]