My pain ______ apparent the moment I walked into the room for the first man I met asked sympathetically: "Are you feeling all ri

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问题 My pain ______ apparent the moment I walked into the room for the first man I met asked sympathetically: "Are you feeling all right?"

选项 A、must be
B、had
C、must have been
D、had to be

答案C

解析 虚拟语气。前面分句中的内容是对过去已发生事实的肯定猜测,所以要用must have done。
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