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- 单项选择题My pain （）obvious the moment I walked into the room, for the first man I met asked me pitifully:" Are you feeling all right?" ( 章节：2 难度：2)
A、must be
B、. must have been
C、could be
D、could have been
- B
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A、must be
B、. must have been
C、could be
D、could have been
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