题目内容
Very few people understood his lecture, the subject of which was very ________.
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This movie is not ________ for children to see: it contains too much violence and too many love scenes.
The wood was so rotten that, when we pulled, it ________ into fragments.
The detective and his assistant have begun to ________ the mysterious murder.
Sadly, the Giant Panda is one of the many species now in danger of ________.
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