He appeared __________ what had been said, though he heard just fine. ( 章节：3 难度：3)
- A、to hear
- B、have not heard
- C、to be hearing
- D、not to have heard
正确答案:D
答案解析:有
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He appeared __________ what had been said, though he heard just fine. ( 章节：3 难度：3)
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