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
| C |
| 试题分析：考查时态。根据her voice had been full of life，说明by the time后面使用过去时。Hang up挂断电话。句意：等到我们挂断电话的时候，她的声音充满了活力。故C正确。 点评：时态的考查主要根据上下文的语境和句子的关键词，本题就是根据上下文的语义来辨析使用的。 |
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